[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; U;6~]0^K
} ^#S
int i1=l; }x-~>$:"
int i2=mid+1; 7s5?^^
for(int cur=l;cur<=r;cur++){ "F|OJ@M
if(i1==mid+1) -NZj:N
data[cur]=temp[i2++]; lV$U!v:b
else if(i2>r) 4%p5X8|\ih
data[cur]=temp[i1++]; T |'Ur#
else if(temp[i1] data[cur]=temp[i1++]; vUgLWd
else {TdKS
data[cur]=temp[i2++]; r#]gAG4t\
} uHQJ&
} w])bQ7)
gA!-F}x$
} F)_Rs5V:(
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改进后的归并排序: t22BO@gt74
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package org.rut.util.algorithm.support; dlK#V)
/43DR;4
import org.rut.util.algorithm.SortUtil; ssi{(}H/Jv
JO7IzD\
/** BaiC;&(
* @author treeroot YT,1E>rd
* @since 2006-2-2 `U!eh1*b
* @version 1.0 ED"5y
*/ `-s+ zG
public class ImprovedMergeSort implements SortUtil.Sort { R`ZU'|
<W/-[ M
private static final int THRESHOLD = 10; =t&B8+6
o|l)oc6{
/* n1uJQt
* (non-Javadoc) v2EM| Q xp
* w>H!H6Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \fU{$
*/ lbT<HWzNH
public void sort(int[] data) { %MbjKw
int[] temp=new int[data.length]; Lvv`_
mergeSort(data,temp,0,data.length-1); U`<EpO{j|
} Fdu0?H2TL
AWQwpaj-
private void mergeSort(int[] data, int[] temp, int l, int r) { dm.?-u;C
int i, j, k; Ej'a G
int mid = (l + r) / 2; 1oj7R7
if (l == r) WU#bA|Cf
return; (rZq0*
if ((mid - l) >= THRESHOLD) w6R=r n
mergeSort(data, temp, l, mid); +#1WOQfAD
else $./JA)`
insertSort(data, l, mid - l + 1); )J~Qx-jG
if ((r - mid) > THRESHOLD) I^M3>}p
mergeSort(data, temp, mid + 1, r); } %S1OQC
else A[ /0on5r
insertSort(data, mid + 1, r - mid); '4dnC2a]
$hndb+6q
for (i = l; i <= mid; i++) { HQ@X"y n
temp = data; gl.P#7X
} 2d<ma*2n(
for (j = 1; j <= r - mid; j++) { _*bXVJ ]
temp[r - j + 1] = data[j + mid]; 0>Ki([3
} ;N]ElwP
int a = temp[l]; 'D\(p,(Mt
int b = temp[r]; r]BB$^@@V
for (i = l, j = r, k = l; k <= r; k++) { L V33vy
if (a < b) { W|D'S}J
data[k] = temp[i++]; g6QkF41nG
a = temp; Gu*;z% b2
} else { faD(,H
data[k] = temp[j--]; nsw.\(#
b = temp[j]; 79:x>i=
} T"9`[Lzva
} &ks>.l\
} a_QO)
w|?Nq?KA
/** NqhRJa63
* @param data R\0]\JEc
* @param l Xd|@w{.m*
* @param i aKH\8O4L5
*/ A{5k}
private void insertSort(int[] data, int start, int len) { kX[I|Z=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4y 582u6^
} dHf_&X2A
} 3iH!;`i
} _~Lhc'^p*
} i1 SP
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堆排序： 4vBZb^W;9
uZmfvMr3
package org.rut.util.algorithm.support; w{2V7*+l
e *;"$7o9
import org.rut.util.algorithm.SortUtil; mtmBL2?
':o.vQdJ
/** #0G9{./C
* @author treeroot us`hR!_
* @since 2006-2-2 Q(Vc/
* @version 1.0 JO+ hD4L
*/ b LL!iz?
public class HeapSort implements SortUtil.Sort{ ;EL!TzL:8
z ; :E~;
/* (non-Javadoc) 7zR7v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ' 'UiQ
*/ 1__p1
public void sort(int[] data) { VD36ce9
MaxHeap h=new MaxHeap(); hbE;zY%hP
h.init(data); <0R?#^XBZB
for(int i=0;i h.remove(); ih ,8'D4
System.arraycopy(h.queue,1,data,0,data.length); : ]CZS
} Xg,E;LSF8
>L&>B5)9
private static class MaxHeap{ 7F|T5[*l
0p Lb<&
void init(int[] data){ #Y`U8n2F
this.queue=new int[data.length+1]; PJA 1/"
for(int i=0;i queue[++size]=data; c/T]=S[
fixUp(size); Z33wA?9
} ?F?!QrL
} ua4QtDSs
Q CfA3*
private int size=0; %0: (''
4~G9._
private int[] queue; Z"e|DP`
>-y'N.l^
public int get() { ) I-8.
return queue[1]; Gt6$@ji4u
} V-7!)&q
<FGNV+?%e
public void remove() { +Icg;m{
SortUtil.swap(queue,1,size--); ^BNg^V.
fixDown(1); .f(x9|K^
} ]MUuz'<
file://fixdown Eg w?
private void fixDown(int k) { 3ufUB^@4v
int j; bE]2:~
while ((j = k << 1) <= size) { M5Pvc
if (j < size %26amp;%26amp; queue[j] j++; X*%KR4`
if (queue[k]>queue[j]) file://不用交换 jw(v08u >
break; Rfa1v*(
SortUtil.swap(queue,j,k); Wv(VV[?/&
k = j; YM1@B`yWE
} s{IycTbz
} hz\7Z+$L_
private void fixUp(int k) { s|EP/=9i
while (k > 1) { EkOBI[`
int j = k >> 1; ~2rZL
if (queue[j]>queue[k]) ?LvZEiJ
break; HK:?Y[ebs
SortUtil.swap(queue,j,k); T:na\y/{j
k = j; f>p;Jh{2fn
} =P0~=UP
} bhuA,}
mjB%"w!S
} ||qsoF5B]
sEhdkN}6
} A5?[j QT0
nW{7L
SortUtil： -] J V
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package org.rut.util.algorithm; Mg^GN-l
Q !S"=2
import org.rut.util.algorithm.support.BubbleSort; )ALf!E%{
import org.rut.util.algorithm.support.HeapSort; 8Jxo;Y
import org.rut.util.algorithm.support.ImprovedMergeSort; 'y;[ fwo7
import org.rut.util.algorithm.support.ImprovedQuickSort; ZIpL4y =_
import org.rut.util.algorithm.support.InsertSort; lm]4zs /A
import org.rut.util.algorithm.support.MergeSort; s:;!QIC5jo
import org.rut.util.algorithm.support.QuickSort; Ds0^/bYp&
import org.rut.util.algorithm.support.SelectionSort; Cd6^aFoK!
import org.rut.util.algorithm.support.ShellSort; LA"`8
Bv!j.$0d{
/** /Pi{Mv eZM
* @author treeroot =AZ>2P
* @since 2006-2-2 ":eHR}Hzx
* @version 1.0 XY0Gjo0
*/ $]xe,}*Af
public class SortUtil { MH!'g7iK8
public final static int INSERT = 1; d;;]+%
public final static int BUBBLE = 2; R2t5T-8`c
public final static int SELECTION = 3; rf]]I#C7
public final static int SHELL = 4; oD~VK,.
public final static int QUICK = 5; >,32~C
public final static int IMPROVED_QUICK = 6; hofZpM
public final static int MERGE = 7; 9:YiLoz?
public final static int IMPROVED_MERGE = 8; d t0?4 d
public final static int HEAP = 9; p~+)!Z#
p0'A\@|
public static void sort(int[] data) { pS*vwYA
sort(data, IMPROVED_QUICK); HPr5mWs:
} A*MlK"
private static String[] name={ H.wp{m{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dO rgqz`e
}; [^~Fu9+"
Ou8@7S
private static Sort[] impl=new Sort[]{ 0I~xD9l9
new InsertSort(), x:@HtTX
new BubbleSort(), F/&Z1G.
new SelectionSort(), ldi'@^
new ShellSort(), y=5s~7]
new QuickSort(), x1Z?x,-D"
new ImprovedQuickSort(), wdl6dLu
new MergeSort(), 7P=1+2V
new ImprovedMergeSort(), 2-]gHAw%
new HeapSort() 8cR4@Hqx
}; ^Zydy
V0ulIKck
public static String toString(int algorithm){ IqcPml{\
return name[algorithm-1]; CKNH/[ZR,
} l)=Rj`M
jo{GPp}
public static void sort(int[] data, int algorithm) { GwW!Q|tVz=
impl[algorithm-1].sort(data); im4V6 f;%
} YX!%R]c%
Aw9^}k}UfD
public static interface Sort { jyLpe2 S
public void sort(int[] data); r`B8Cik
} Vk@u|6U'
WR gAc%
public static void swap(int[] data, int i, int j) { ,MuLu,$/
int temp = data; kJHUaXM
data = data[j]; $*L@ym
data[j] = temp; J3y5R1?EP
} d!e$BiC
} 3DMfR ofg