[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; .5L/<
} s5|LD'o!
int i1=l; I>/`W
int i2=mid+1; "r cPJX
for(int cur=l;cur<=r;cur++){ y5a^xRDw
if(i1==mid+1) EN.yU!N.4
data[cur]=temp[i2++]; lGG1d
else if(i2>r) w,8 M
data[cur]=temp[i1++]; ] >ipC,v
else if(temp[i1] data[cur]=temp[i1++]; Djf2ir'
else dG7sY O@U
data[cur]=temp[i2++]; ~\<ZWU<BE
} ^.kas7<
} qa^x4xZM
%n}fkj'
} Vu`dEvL?
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改进后的归并排序: +KFK..
aSHZR
package org.rut.util.algorithm.support; y#AY+ >
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import org.rut.util.algorithm.SortUtil; .NjdkHYR
ec1g7w-n
/** 4EB$e?
* @author treeroot eV9:AN}K=
* @since 2006-2-2 K1:F{*
* @version 1.0 2SG|]=
*/ 6El%T]^
public class ImprovedMergeSort implements SortUtil.Sort { =q xcM+OX1
e7#=F6
private static final int THRESHOLD = 10; qx0o,oZN!
*kyy''r
/* 8"8{Nf-"
* (non-Javadoc) xDADJ>u2K
* m$LZ3=v%8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W\~ZmA.
*/ "r"]NyM
public void sort(int[] data) { /Z2*>7HM8[
int[] temp=new int[data.length]; qWE"vI22M
mergeSort(data,temp,0,data.length-1); nj7Ri=lyS
} Z/-%Eb]L1
'2[ _U&e
private void mergeSort(int[] data, int[] temp, int l, int r) { {##A|{$3%
int i, j, k; |xKB><
int mid = (l + r) / 2; ;;nmF#
if (l == r) SmR*b2U
return; [c86b
if ((mid - l) >= THRESHOLD) )0}obPp
mergeSort(data, temp, l, mid); LiV]!*9$KG
else b:O4d<+%
insertSort(data, l, mid - l + 1); <Isr
if ((r - mid) > THRESHOLD) y Fp1@*ef
mergeSort(data, temp, mid + 1, r); *"zE,Bp"
else iI ^{OD
insertSort(data, mid + 1, r - mid); (/*-M]>
_4E+7+
for (i = l; i <= mid; i++) { t&r?O dc&m
temp = data; |um)vlN;9
} uDoSe^0
for (j = 1; j <= r - mid; j++) { fs)O7x-B(
temp[r - j + 1] = data[j + mid]; 9(X *[X#
} %;W8;
int a = temp[l]; m9e$ZZG$
int b = temp[r]; !h4So4p
for (i = l, j = r, k = l; k <= r; k++) { ^Ws~h\{%
if (a < b) { um8ZhXq
data[k] = temp[i++]; :sA-$*&x
a = temp; Yhsb$wu
} else { }+=@Ci
data[k] = temp[j--]; xq~=T:>/A
b = temp[j]; IB;y8e,
} hcf>J6ZLT
} *n[Fl
} `7 B [<
J|DWT+$#Z
/** "V:UQ<a\
* @param data R6:N`S]&d[
* @param l ihYfWG|
* @param i dO8Z {wfs
*/ 6w]]KA
private void insertSort(int[] data, int start, int len) { /?6y2t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #F{|G:\@[
} u8,T>VNVw
} 5j}@Of1pd
} jcG4h/A
} XqwdJND
n&V(c&C
堆排序： dF?pEet?2
@%fkW"y:
package org.rut.util.algorithm.support; C3<3
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import org.rut.util.algorithm.SortUtil; VI+Y4T@
ePY K^D
/** ~ZDdzp>
* @author treeroot tllg$CQ5
* @since 2006-2-2 qzmZ/z96
* @version 1.0 #tfJ?w`
*/ {U<htl4
public class HeapSort implements SortUtil.Sort{ 4Sl^cKb$7
^IId =V=2
/* (non-Javadoc) 3&*%>)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rd!.8K[
*/ n&Tv]-
public void sort(int[] data) { .ev]tu2N
MaxHeap h=new MaxHeap(); [{c8:)ar
h.init(data); ~G$OY9UC
for(int i=0;i h.remove(); "bO]
System.arraycopy(h.queue,1,data,0,data.length); @6tx5D?
} JH5])i0
6x7=0}'
private static class MaxHeap{ v|'N|k l
{38aaf|'/
void init(int[] data){ g ` {0I[
this.queue=new int[data.length+1]; }9kq?
for(int i=0;i queue[++size]=data; 97g-*K
fixUp(size); ejQCMG7
} wb?hfe
} xSUR<
|UaI i^
private int size=0; Q6>vF)( -
b$eJH
private int[] queue; IpP0|:}
d^Wh-U
public int get() { bpILiC
return queue[1]; N?Z?g_a8
} !6%mt}h
%In"Kh*
public void remove() { h=tY 5]8
SortUtil.swap(queue,1,size--); E}GSii%S
fixDown(1); /6fPC;l
} M#p,Z F
file://fixdown 'GyPl
private void fixDown(int k) { =1(BKk>
int j; (l,o UBRr
while ((j = k << 1) <= size) { sDC RL%0QK
if (j < size %26amp;%26amp; queue[j] j++; lyPXlt
if (queue[k]>queue[j]) file://不用交换 W7 E-j+2
break; z~_\onC
SortUtil.swap(queue,j,k); -jy"?]ve.
k = j; Rju8%FRO
} Z8@]e}n
} u0e#iX
private void fixUp(int k) { Rb0{t[IU
while (k > 1) { tvUvd(8w
int j = k >> 1; R pbl)
if (queue[j]>queue[k]) oGqv,[$qN
break; ?x0yiV~dL
SortUtil.swap(queue,j,k); 2uTa}{/%
k = j; ww2Qa-K
} Ss:,#|
} +g[B &A!d+
K_aN7?#.v`
} ._3NqE;
.R'i=D`Pz
} i=D,T[|>a
^&.?kJM
SortUtil： LA+MX0*
v3"xJN_,[p
package org.rut.util.algorithm; $Da^z[8e
?X1#b2s
import org.rut.util.algorithm.support.BubbleSort; iQF}x&a<
import org.rut.util.algorithm.support.HeapSort; x(`$D
import org.rut.util.algorithm.support.ImprovedMergeSort; rZv+K/6*M
import org.rut.util.algorithm.support.ImprovedQuickSort; yDC97#%3u
import org.rut.util.algorithm.support.InsertSort; ,Aii>D]
import org.rut.util.algorithm.support.MergeSort; ;cr6Xop#?
import org.rut.util.algorithm.support.QuickSort; c v 9 6F
import org.rut.util.algorithm.support.SelectionSort; >N J$ac
import org.rut.util.algorithm.support.ShellSort; WdAGZUp
SS~Q;9o
/** $%JyM
* @author treeroot t["Df;"O
* @since 2006-2-2 ^IH1@
* @version 1.0 qrc/Q;$
*/ cZ>W8{G
public class SortUtil { L'Zud,JKg
public final static int INSERT = 1; 3c3Z"JV
public final static int BUBBLE = 2; ^j %UZ
public final static int SELECTION = 3; nS4S[|w"
public final static int SHELL = 4; AF$o>f
public final static int QUICK = 5; ^Q>*f/.KN
public final static int IMPROVED_QUICK = 6; JWL J<z
public final static int MERGE = 7; -/%jeDKp
public final static int IMPROVED_MERGE = 8; "~<~b2Y"5
public final static int HEAP = 9; jVIpbG44
gpWS_Dw9
public static void sort(int[] data) { ^mpB\D)q
sort(data, IMPROVED_QUICK); @UX@puK`/
} ;vdgF
private static String[] name={ @W8}N|jek
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DZRxp,
}; l`&6W?C
c5e\ckqm^
private static Sort[] impl=new Sort[]{ S$52KOo
new InsertSort(), ]gksyxn3
new BubbleSort(), ?8@*q6~8
new SelectionSort(), C4tl4df9
new ShellSort(), E{s|#
new QuickSort(), |vz;bJG
new ImprovedQuickSort(), zDyeAxh4
new MergeSort(), xUi!|c
new ImprovedMergeSort(), (N|xDl&;
new HeapSort() &o@5%Rz2/
}; k+$4?/A
8 -;ZPhN&
public static String toString(int algorithm){ 3gy;$}Lq T
return name[algorithm-1]; NRSse"
} }27Vh0v
Vor9 ?F&w
public static void sort(int[] data, int algorithm) { IGT_ 5te
impl[algorithm-1].sort(data); 7RE6y(V1
} B:4qW[U#
~^~RltY
public static interface Sort { tq[",&K
public void sort(int[] data); \)ZX4rs{8
} t[,T}BCy.
ddDJXk)!0
public static void swap(int[] data, int i, int j) { Y&f[2+?2NK
int temp = data; Wmxw!
data = data[j]; $S8bp3)
data[j] = temp; OIty ]c
} Q 02??W
} h<ctW>6v