[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; toS(UM n
} ;Pol#0_(
int i1=l; E3~,+68U
int i2=mid+1; N_u&3CG
for(int cur=l;cur<=r;cur++){ Kcscz,
if(i1==mid+1) %sOWg.0_
data[cur]=temp[i2++]; zuC58B
else if(i2>r) <ICZ"F`S
data[cur]=temp[i1++]; 1A7%0/K-]
else if(temp[i1] data[cur]=temp[i1++]; lv<iJH\
else .-SDo"K.h
data[cur]=temp[i2++]; g ,/a6M
} D~G5]M,}$
} F[>7z3I
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} :r1;}hIA9
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改进后的归并排序: V,>+G6e
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package org.rut.util.algorithm.support; 0K=Qf69Y
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import org.rut.util.algorithm.SortUtil; 0Y2\n-`z
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/** XIr{U5$<6
* @author treeroot 2Pbe~[
* @since 2006-2-2 Q)x?B]b-
* @version 1.0 w{k1Y+1
*/ 1a7!4)\
public class ImprovedMergeSort implements SortUtil.Sort { e$CePLEj
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private static final int THRESHOLD = 10; lhLnygUk
*)MX%`Z}
/* <lC]>L
* (non-Javadoc) V~/.Y&WN
* H7{Q@D8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %xf)m[JU=
*/ IZv~[vi_
public void sort(int[] data) { 8|1`Tn}o
int[] temp=new int[data.length]; 6BDt.bG
mergeSort(data,temp,0,data.length-1); +68+PhHF
} 2{Wo-B,wt~
:z B}z^8-
private void mergeSort(int[] data, int[] temp, int l, int r) { Sa%zre@
int i, j, k; kP)YgkE
int mid = (l + r) / 2; FhWmO
if (l == r) @@'nit
return; uWUR3n
if ((mid - l) >= THRESHOLD) 3LKB;
mergeSort(data, temp, l, mid); CD^CUbGk
else c]6V"Bo}A
insertSort(data, l, mid - l + 1); %4j&H!y-w;
if ((r - mid) > THRESHOLD) ;knd7SC
mergeSort(data, temp, mid + 1, r); |J:$MX~
else ./#e1m?.
insertSort(data, mid + 1, r - mid); 'dkXYtKCB
#2h+dk$1
for (i = l; i <= mid; i++) { Ds{{J5Um%
temp = data; i\(\MzW*'
} M(qxq(#{U
for (j = 1; j <= r - mid; j++) { PKi_Zh.D
temp[r - j + 1] = data[j + mid]; GtF2@\
} Z`rK\Bc
int a = temp[l]; >4,{6<|
int b = temp[r]; %PzQ\c
for (i = l, j = r, k = l; k <= r; k++) { 'nMApPl
if (a < b) { A^pu
data[k] = temp[i++]; 1<`9HCm
a = temp; w|=gSC-o
} else { N6h1|_o
data[k] = temp[j--]; 6MuWlCKF8
b = temp[j]; (YIhTSL"]
} Z)/6??/R
} Kaf>
} `8,w[o oC2
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/** fCB:733H
* @param data "ml?7Xl,n
* @param l Yj) e$f
* @param i Xq|nJ|h
*/ WM/#.
private void insertSort(int[] data, int start, int len) { Mec{_jiH&D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8 4z6zFv?Q
} 2 #KoN8%
} -&imjy<
} F<5nGx cC
} "9qp"%
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堆排序： cqEHYJ;B
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package org.rut.util.algorithm.support; wy''tqg6
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import org.rut.util.algorithm.SortUtil; r=qLaPG
yIOLs}!SF
/** qbXz7s*{
* @author treeroot fE^uF[-7?
* @since 2006-2-2 vXb:
* @version 1.0 $_)=8"Sn
*/ ,<sm,!^<r
public class HeapSort implements SortUtil.Sort{ 4b4QbJ$
aM$\#Cx
/* (non-Javadoc) eaQ90B4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nX._EC
*/ AliRpxxd
public void sort(int[] data) { ~n6[$WjZA
MaxHeap h=new MaxHeap(); ;-Ss# &
h.init(data); 1~'_K9eE
for(int i=0;i h.remove(); |q_ !. a
System.arraycopy(h.queue,1,data,0,data.length); =2,0Wo]$
} W<NmsG})_g
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private static class MaxHeap{ .|uLt J
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void init(int[] data){ :M j_2
this.queue=new int[data.length+1]; _R7 w?!t8
for(int i=0;i queue[++size]=data; t}Ss=0dJO
fixUp(size); :mpiAs<%U"
} =OYQM<q
} W/r^ugDV
f jI#-
private int size=0; Wr>(#*r7q
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private int[] queue; 4\p-TPM
x l0DN{PG
public int get() { aX^+ O,
return queue[1]; Pdw#o^Iq^
} 4<.O+hS
nLy#|C
public void remove() { "!H@k%eAM|
SortUtil.swap(queue,1,size--); se!mb _!
fixDown(1); }>&KUl
} )47MFNr~>
file://fixdown ;LRW 8Wd
private void fixDown(int k) { M$A#I51
int j; &aPl`"j
while ((j = k << 1) <= size) { %jEY3q
if (j < size %26amp;%26amp; queue[j] j++; <tbZj=*O/o
if (queue[k]>queue[j]) file://不用交换 i"HgvBHx
break; 9cd8=][
SortUtil.swap(queue,j,k); K)S;:MLG=
k = j; z856 nl
} >|3a 9S
} 0@)%h&mD
private void fixUp(int k) { frN3S
while (k > 1) { Km3&N
int j = k >> 1; DA"}A`HfI
if (queue[j]>queue[k]) @T&t.|`
break; K=6UK%y A
SortUtil.swap(queue,j,k); =MLf[
k = j; XoR>H4xh
} +y&d;0!
} ?t rV72D
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} rg5]&<Vq8
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} j7 d:v7+_
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SortUtil： '<@=vGsye
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package org.rut.util.algorithm; 9vI]LfP
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import org.rut.util.algorithm.support.BubbleSort; *Oo &}oAj
import org.rut.util.algorithm.support.HeapSort; }nud
import org.rut.util.algorithm.support.ImprovedMergeSort; NQ9Ojj{#
import org.rut.util.algorithm.support.ImprovedQuickSort; w#(RW7":F
import org.rut.util.algorithm.support.InsertSort; [f!O6moR6
import org.rut.util.algorithm.support.MergeSort; ;=jr0\|e
import org.rut.util.algorithm.support.QuickSort; &|5GB3H=
import org.rut.util.algorithm.support.SelectionSort; },c,30V'
import org.rut.util.algorithm.support.ShellSort; IfV 3fJ7
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/** 4;KWG}~[o
* @author treeroot 0JY WrPR
* @since 2006-2-2 [VSU"AJY
* @version 1.0 EO)%UrWnC
*/ +.Bmkim
public class SortUtil { &uM^0eM
public final static int INSERT = 1; GXX+}=b7qO
public final static int BUBBLE = 2; SwH2$:f
public final static int SELECTION = 3; &ZJgQ-Pc(m
public final static int SHELL = 4; ^#e~g/
public final static int QUICK = 5; (/h5zCc/v
public final static int IMPROVED_QUICK = 6; UG2w 1xqHw
public final static int MERGE = 7; lBA+zZ
public final static int IMPROVED_MERGE = 8; k0H#:c}
public final static int HEAP = 9; z.)p P'CJo
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public static void sort(int[] data) { ?KWj}|%
sort(data, IMPROVED_QUICK); *'R#4@wmP
} A0xC,V~z
private static String[] name={ ~kKrDLW+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x#8w6@iPQ
}; hI|)u4q
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private static Sort[] impl=new Sort[]{ ~]uZy=P? 5
new InsertSort(), D>sYPrf
new BubbleSort(), V"RpH,
new SelectionSort(), oRq!=eUu_
new ShellSort(), !/I0i8T
new QuickSort(), RT*5d;l0
new ImprovedQuickSort(), xiM&$<LpR
new MergeSort(), {G*QY%j^
new ImprovedMergeSort(), \ijMw
new HeapSort() GAEO$e:
}; rZwB>c
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public static String toString(int algorithm){ S~F`
return name[algorithm-1]; 7#-y-B]l
} :w-`PYJ%G
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public static void sort(int[] data, int algorithm) { sR_xe}-
impl[algorithm-1].sort(data); {'bip`U.
} 7*+TP~WI
j"7 JLe*
public static interface Sort { \4bWWy
public void sort(int[] data); v[S-Pi1
} 'Ud|Ex@A9
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public static void swap(int[] data, int i, int j) { >3D7tK(
int temp = data; fCX*R"
data = data[j]; Q9>U1]\
data[j] = temp; (f1M'w/OD
} q<{NO/Mm
} O`W%Tr