[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; /n2qW.qJ>
} bA-/"'Vp9
int i1=l; 1gA^Qv~?
int i2=mid+1; s||c#+j"8
for(int cur=l;cur<=r;cur++){ u?F^gIw
if(i1==mid+1) |2Y/l~
data[cur]=temp[i2++]; zH13~\
else if(i2>r) 43}uW,P
data[cur]=temp[i1++]; p)qM{`]G\
else if(temp[i1] data[cur]=temp[i1++]; SIZ&0V
else [$DI!%e|
data[cur]=temp[i2++]; z',f'3+
} U>i}C_7g
} }Ip1|Gj
X:/7#fcG8
} o zMn8@R
cCuK?3V4K
改进后的归并排序: K0{ ,*>C
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package org.rut.util.algorithm.support; 7<*,O&![|
OJ1MV7&
import org.rut.util.algorithm.SortUtil; Eb7GiRT#
,_UTeW6M
/** U+Vb#U7;
* @author treeroot )zydD=,bu
* @since 2006-2-2 #Ibpf ,
* @version 1.0 o3X0c6uU
*/ sE])EwZ
public class ImprovedMergeSort implements SortUtil.Sort { Ov#G7a"
]-sgzM]q
private static final int THRESHOLD = 10; 1=_Qj}!1
cl'wQ1<:
/* G-TD9OgZ
* (non-Javadoc) 2BO&OX|X
* [ <j4w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =PjxMC._
*/ Q0%s|8Jc
public void sort(int[] data) { +xuj]J
int[] temp=new int[data.length]; z~th{4#E;
mergeSort(data,temp,0,data.length-1); wg4Ol*y'
} v"l8[::
PDS?>Jg(
private void mergeSort(int[] data, int[] temp, int l, int r) { RBLOc$2
int i, j, k; T930tX6"h
int mid = (l + r) / 2; Cwl:
if (l == r) 2%/+r
return; >uxAti\
if ((mid - l) >= THRESHOLD) WFTwFm6
mergeSort(data, temp, l, mid); tHEZuoi
else w8bvqTQ
insertSort(data, l, mid - l + 1); +OZ\rs
if ((r - mid) > THRESHOLD) G1Vn[[%k
mergeSort(data, temp, mid + 1, r); =z4J[8bb
else D,()e^o
insertSort(data, mid + 1, r - mid); !xU[BCbfYV
VHG}'r9KC%
for (i = l; i <= mid; i++) { &@${@
temp = data; M[C)b\
} buDz]ec b
for (j = 1; j <= r - mid; j++) { *=P*b|P"$
temp[r - j + 1] = data[j + mid]; aoBiN_
} $WO{!R
int a = temp[l]; MS]Q\g}U
int b = temp[r]; A6 RwLX
for (i = l, j = r, k = l; k <= r; k++) { JL[!8NyU
if (a < b) { k~?5mUyK<
data[k] = temp[i++]; 6#Rco%07zI
a = temp; lx7]rkWo|a
} else { F##xVmR~
data[k] = temp[j--]; j^/=.cD|
b = temp[j]; %LuA:{EVD
} hrGX65>
} _j*a5fsPU
} O Q$C#:?
!="8ok+
/** EMDYeXpV
* @param data tO?-@Qf/9<
* @param l 5}b)W>3@`
* @param i !JBj%|!
*/ Ir=G\/A
private void insertSort(int[] data, int start, int len) { ?<T=g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /t*Q"0X5
} Y ` Z,52
} h"[:$~/UJ
} n(i/jW~0w
} _h 6c[*
v57<b&p26
堆排序： ,N nh$F
RRQIlI<
package org.rut.util.algorithm.support; n}- _fx
>s )L(DHa"
import org.rut.util.algorithm.SortUtil; 2XEE/]^
g+7j?vC{'
/** TM|PwY
* @author treeroot 9aX!<Z
* @since 2006-2-2 :i|]iXEI"
* @version 1.0 ah,"c9YX
*/ yivWT;`
public class HeapSort implements SortUtil.Sort{ KT17I&:
nPDoK!r'
/* (non-Javadoc) p 16+(m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R&$fWV;'
*/ 3`)ej`
public void sort(int[] data) { ,9MNB3
MaxHeap h=new MaxHeap(); 8n:N#4Dh^
h.init(data); abCxB^5VL
for(int i=0;i h.remove(); jfVw{\l
System.arraycopy(h.queue,1,data,0,data.length); 4?bvJJuf)
} .&`apQD}
,gM:s}l!dJ
private static class MaxHeap{ ,`YIcrya:
H}q$6WE
void init(int[] data){ +1@'2w{
this.queue=new int[data.length+1]; mD|Q+~=|e
for(int i=0;i queue[++size]=data; OJhMM-
fixUp(size); >&k`NXS|V
} gf>GK/^HH
} _^`V0>Mh:
sZ7~AJ
private int size=0; B@#vS=g
z@ `u$D$n
private int[] queue; F/[m.!Eo
Rf2mBjJ(z
public int get() { 0cVxP)J+
return queue[1]; %|1s9?h7\
} RKM5FXX
Z9*@w`x^u
public void remove() { =-&h@mB;G
SortUtil.swap(queue,1,size--); tR2%oT>h
fixDown(1); 2E`mbT,v&
} mNEh\4ai
file://fixdown `M(st%@n
private void fixDown(int k) { c=QN!n:
int j; jw 5 U-zi
while ((j = k << 1) <= size) { ReL+V
if (j < size %26amp;%26amp; queue[j] j++; rl&.|;5uH;
if (queue[k]>queue[j]) file://不用交换 }Z t#OA $
break; @ &Od1X
SortUtil.swap(queue,j,k); uBn35%
k = j; &FJr?hY%
} E@#<p-@~
} y~wr4Q=
private void fixUp(int k) { SqdI($F\:
while (k > 1) { Aon.Y Z
int j = k >> 1; ]0[ot$Da6
if (queue[j]>queue[k]) _OS,zZ0
break; ^zS;/%
SortUtil.swap(queue,j,k); N9y+Psh
k = j; LGVy4D
} E7_OI7C
} ckv8QAm
0IP0zil
} tmM; Z(9t
0&b;!N!vJ
} DL,]iJm
O6ugN-d>
SortUtil： 9sd}Z,l
};EB[n
package org.rut.util.algorithm; =dQ/^C_hj
K5\l (BB
import org.rut.util.algorithm.support.BubbleSort; A wk1d
import org.rut.util.algorithm.support.HeapSort; c&{= aIe w
import org.rut.util.algorithm.support.ImprovedMergeSort; b!`Ze~V
import org.rut.util.algorithm.support.ImprovedQuickSort; t5u#[*
import org.rut.util.algorithm.support.InsertSort; bd% M.,
import org.rut.util.algorithm.support.MergeSort; ~C>Q+tR8
import org.rut.util.algorithm.support.QuickSort; DlAwB1Ak
import org.rut.util.algorithm.support.SelectionSort; @LDs$"f9=
import org.rut.util.algorithm.support.ShellSort; 0vBQzM Q
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/** J#t8xL
* @author treeroot 25 :vc0
* @since 2006-2-2 q(L.i)w$
* @version 1.0 7~'%ThUb$-
*/ fX6pW%Q'6
public class SortUtil { "a33m:]J
public final static int INSERT = 1; ?4Fev_5m
public final static int BUBBLE = 2; LP'q$iB!
public final static int SELECTION = 3; 1$6 u
public final static int SHELL = 4; mH5>50H;
public final static int QUICK = 5; {?EmO+![}
public final static int IMPROVED_QUICK = 6; CdPQhv)m
public final static int MERGE = 7; ;l `Ufx
public final static int IMPROVED_MERGE = 8; 0Zo><=
public final static int HEAP = 9; VGu(HB8n#
yOvV"x]
public static void sort(int[] data) { 8>D*U0sNl
sort(data, IMPROVED_QUICK); NWQ7%~#k*
} ,Mi'NO
private static String[] name={ ua &uR7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^P/OHuDL
}; Fi\)ka\u
aG4 ^xOD
private static Sort[] impl=new Sort[]{ BM)a,fIgo
new InsertSort(), a|[f%T<<
new BubbleSort(), f~TkU\Rh
new SelectionSort(), %W|Sl
new ShellSort(), x_?K6[G&}
new QuickSort(), g2'K3e?.%
new ImprovedQuickSort(), "&^KnWk=
new MergeSort(), m(kv:5<>
new ImprovedMergeSort(), 4e; le&
new HeapSort() px+]/P<dX
}; )hoVB
_FS #~z'j
public static String toString(int algorithm){ R%)F9P$o
return name[algorithm-1]; v$(Z}Hg
} wN/v-^2
<mTo54g
public static void sort(int[] data, int algorithm) { In!^+j
impl[algorithm-1].sort(data); qt"6~r!
} NiE`u m
T?.l_"%%d
public static interface Sort { FYefn3b
public void sort(int[] data); f4NN?"W)
} @KLX,1K
U7f o4y1}
public static void swap(int[] data, int i, int j) { rwh4/h^S
int temp = data; [C~N#S[]
data = data[j]; h4Arg~Or
data[j] = temp; pmi[M)D
} (dO0`wfM
} 5xNOIOpDB