[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; +TXX$)3%
} KtNY_&xd
int i1=l; j~*L~7
int i2=mid+1; W.kM7z>G
for(int cur=l;cur<=r;cur++){ 6{txm+U
if(i1==mid+1) _a1x\,R|DB
data[cur]=temp[i2++]; )"pF R4
else if(i2>r) O{#=d
data[cur]=temp[i1++]; F_CYYGZ
else if(temp[i1] data[cur]=temp[i1++]; 72'5%*1
else JQ"U4GVp
data[cur]=temp[i2++]; iX)%Q
} JH7<
} &RfC"lc
ocs+d\
} ynbuN x*
AM!G1^c
改进后的归并排序: ~?(N
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package org.rut.util.algorithm.support; 7Hs%Cc"
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import org.rut.util.algorithm.SortUtil; I'LnI*
1')%`~
/** t<#h$}=:Vt
* @author treeroot b9!FC$^J
* @since 2006-2-2 6Oy$gW)
* @version 1.0 )rC6*eR
*/ r(P(Rj2~
public class ImprovedMergeSort implements SortUtil.Sort { 0=?<y'=
@Z12CrJ
private static final int THRESHOLD = 10; =zz~kon9
#"B\UN
/* ^jx7@LgS=
* (non-Javadoc) M]J^N#
* O&Y*pOg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ftr5k^!
*/ ')$+G152
public void sort(int[] data) { V;v8=1t!
int[] temp=new int[data.length]; ml+; Rmvb
mergeSort(data,temp,0,data.length-1); #)nSr
} aeD;5VV
,'u W*kx
private void mergeSort(int[] data, int[] temp, int l, int r) { h D/*h*}T>
int i, j, k; nR-YrR*k
int mid = (l + r) / 2; 3xaR@xjS
if (l == r) cH&J{WeZa
return; -[wGX}}
if ((mid - l) >= THRESHOLD) aJ>65RJ^=
mergeSort(data, temp, l, mid); ;<ZLcTL
else S Em Q@1
insertSort(data, l, mid - l + 1); |AozR ~
if ((r - mid) > THRESHOLD) N(Tz%o4
mergeSort(data, temp, mid + 1, r); @"^0%/2-
else hbY5l}\5
insertSort(data, mid + 1, r - mid); N'GeHByIT
|EJD3&
for (i = l; i <= mid; i++) { BW$"`T@c6~
temp = data; (^Y~/
} i uF*.hc,%
for (j = 1; j <= r - mid; j++) { IhVO@KJI
temp[r - j + 1] = data[j + mid]; vwxXgk
} ?k(7 LX0j
int a = temp[l]; ;;#qmGoE
int b = temp[r]; )% ~OH
for (i = l, j = r, k = l; k <= r; k++) { a m|F?|1
if (a < b) { 73/P&hT
data[k] = temp[i++]; AHXSt
a = temp; LhA/xf
} else { pu2tY7Ja
data[k] = temp[j--]; )mF5Vw"
b = temp[j]; N/MUwx;P
} 8; 0A g
} (pv+c,
} X\bOz[\
;)D];u|_
/** xHD=\,{ig
* @param data 2#c<\s|C
* @param l ww],y@da
* @param i R}*_~7r5
*/ 8Djc c z
private void insertSort(int[] data, int start, int len) { *%%g{ 3$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VHIOwzC
} 0Ziw_S\d&s
} P\1L7%*lU
} hoK>~:;
} .y!<t}
9_Be0xgJ3^
堆排序： 2AT5
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package org.rut.util.algorithm.support; < t,zaIi
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import org.rut.util.algorithm.SortUtil; {>hC~L?6
W3MJr&p
/** xMTKf+7
* @author treeroot pKpUXfQu
* @since 2006-2-2 X-K=!pET
* @version 1.0 wn/_}]T
*/ L~lxXTG\
public class HeapSort implements SortUtil.Sort{ >\KNM@'KI
u{['<r;I
/* (non-Javadoc) RI(DXWM|h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )u[emv$
*/ A kC1z73<
public void sort(int[] data) { $4h5rC g0
MaxHeap h=new MaxHeap(); ywGd>@
h.init(data); J}v}~Cv
for(int i=0;i h.remove(); \LR~r%(rM
System.arraycopy(h.queue,1,data,0,data.length); &"&Z #llb
} =P't(<
zv0l,-o
private static class MaxHeap{ Yc_8r+;(
p<2L.\6"
void init(int[] data){ ,,%i;
this.queue=new int[data.length+1]; gQ Fjr_IS#
for(int i=0;i queue[++size]=data; 7%Gwc?[x
fixUp(size); J??-j
} ;z}i-cNae
} B+\3-q
D~S<U
private int size=0; .HS"}A T
BJ$9vbhZN
private int[] queue; {< )1q ;
>3_jWFq
public int get() { [ 9 {*94M
return queue[1]; I,>-tGK
} e:fy#,HEj{
Mo?~_|}
public void remove() { V58wU:li
SortUtil.swap(queue,1,size--); JTO~9>$ B
fixDown(1); de.&`lPRf
} Dz>^IMsY
file://fixdown )h"<\%LU
private void fixDown(int k) { y{ibO}s
int j; ^1iSn)&
while ((j = k << 1) <= size) { JEXy%hl
if (j < size %26amp;%26amp; queue[j] j++; l=S35og
if (queue[k]>queue[j]) file://不用交换 e6@=wnoX u
break; re/@D@%
SortUtil.swap(queue,j,k); qE&v ;
k = j; YVQN&|-
} PRu 6xsyA
} .7e2YI,S
private void fixUp(int k) { #hfXZVD
while (k > 1) { \KMToN&2
int j = k >> 1; Uzz'.K(Mv|
if (queue[j]>queue[k]) rI= v
break; be]bZ 1f
SortUtil.swap(queue,j,k); Tl(^
k = j; F,W~,y
} *SU\ABcov
} U`R5'Tf;
ZZ2vvtlyG
} `Nz/Oh7
4r>6G/b8*
} ")O%86_Q:
[Y|8\Ph`&
SortUtil： ~ELNyI11
2`7==?
package org.rut.util.algorithm; GPkmf%FJ
2D75:@JL}|
import org.rut.util.algorithm.support.BubbleSort; xHL( !PF
import org.rut.util.algorithm.support.HeapSort; d"}k! 0m
import org.rut.util.algorithm.support.ImprovedMergeSort; d4u})
import org.rut.util.algorithm.support.ImprovedQuickSort; t2/#&J]
import org.rut.util.algorithm.support.InsertSort; 6IBgt!=,
import org.rut.util.algorithm.support.MergeSort; Yw4n-0g
import org.rut.util.algorithm.support.QuickSort; $7O}S.x
import org.rut.util.algorithm.support.SelectionSort; t[ubn+
import org.rut.util.algorithm.support.ShellSort; QS%%^+E2
e<3K;Q
/** aC$B2
* @author treeroot aZ2!i
* @since 2006-2-2 ]NUl9t*N4
* @version 1.0 JlH&??
*/ K(q+ "
public class SortUtil { ]$ L|
public final static int INSERT = 1; '8Q]C*Z
public final static int BUBBLE = 2; ^T*?>%`
public final static int SELECTION = 3; veMH
public final static int SHELL = 4; /qMG=Z
public final static int QUICK = 5; "@%7-nu
public final static int IMPROVED_QUICK = 6; 0H6(EzN
public final static int MERGE = 7; i!J8 d"
public final static int IMPROVED_MERGE = 8; S=5<^o^h3
public final static int HEAP = 9; %-)H^i~]%
)2Wi`ZT
public static void sort(int[] data) { 7|{}\w(I
sort(data, IMPROVED_QUICK); ;nep5!s;<
} vMA]j>>
private static String[] name={ wN@oYFoL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2/vMoVT,
}; -=%@L&y1
QqFR\6
private static Sort[] impl=new Sort[]{ (\\eo
new InsertSort(), pOGeruu?
new BubbleSort(), v=0(~<7B
new SelectionSort(), GR&z,
new ShellSort(), .:@Ykdm4I
new QuickSort(), fKeT,U`W
new ImprovedQuickSort(), 'C`U"I
new MergeSort(), _7H7 dV
new ImprovedMergeSort(), !k6K?xt
new HeapSort() DnC{YK
}; E)TN,@%
6VS4y-N
public static String toString(int algorithm){ wP6Fl L
return name[algorithm-1]; QN #U)wn:
} J3e96t~u
N*"p|yhd]
public static void sort(int[] data, int algorithm) { s%qF/70'
impl[algorithm-1].sort(data); e5*ni/P
} S]bmS6#
-K q5i
public static interface Sort { \#f<!R4
public void sort(int[] data); UYk/v]ZA
} K?[q%W]%
xDG2ws=@D
public static void swap(int[] data, int i, int j) { +fC=UAZ
int temp = data; @LS@cCC,a
data = data[j]; rX4j*u2u
data[j] = temp; mkYqpD7
} Sm)Ha:[4
} hWM< 0=