[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; 19UN*g3(
} u bW]-U=T
int i1=l; xTz%nx
int i2=mid+1; O XP\R
for(int cur=l;cur<=r;cur++){ g(4bBa9y
if(i1==mid+1) n/4i|-^
data[cur]=temp[i2++]; r 2:2,5_
else if(i2>r) /)3Lnn{W
data[cur]=temp[i1++]; aSutM
else if(temp[i1] data[cur]=temp[i1++]; 0<p{BL8
else R.9V,R5
data[cur]=temp[i2++]; PoSpkJH
} a;AzY'R
} >QkP7Kb
8V/L:h#7
} ci9R.U)
L=; -x9
改进后的归并排序: ??&<k
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package org.rut.util.algorithm.support; *m+BuGt|
9&]M**X
import org.rut.util.algorithm.SortUtil; \wvg,j=
+-?/e-z")
/** yYZxLJ='
* @author treeroot 5@~|*g[
* @since 2006-2-2 u9qMqeF
* @version 1.0 w n|]{Ww35
*/ 1GCzyBSbb
public class ImprovedMergeSort implements SortUtil.Sort { Vr.Y/3N&'
dtt~ Bd
private static final int THRESHOLD = 10; cC{"<fYF
s%4M$e
/* "Zv~QwC
* (non-Javadoc) WYcA8X/
* 5e8AmY8;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }28=
*/ ,E )|y4
public void sort(int[] data) { 0MF}^"R
int[] temp=new int[data.length]; c]k*}W3T
mergeSort(data,temp,0,data.length-1); _QOZsEe
} $.%rAa_H
Dh4 6o|P
private void mergeSort(int[] data, int[] temp, int l, int r) { 8 .>/6M
int i, j, k; iUk-'
int mid = (l + r) / 2; @C_KV0i
if (l == r) )FN;+"IJ
return; KJn!Ap
if ((mid - l) >= THRESHOLD) e.d #wyeX
mergeSort(data, temp, l, mid); bpAv1udX-W
else nAJdr*`a,5
insertSort(data, l, mid - l + 1); (.Y/
if ((r - mid) > THRESHOLD) rh*sbZ68>E
mergeSort(data, temp, mid + 1, r); 1Tp/MV/>
else $g9**b@
insertSort(data, mid + 1, r - mid); k;W@LfP
OHrY(I6
for (i = l; i <= mid; i++) { ZD/jX_!t
temp = data; +0wT!DZW\=
} l\0w;:N3
for (j = 1; j <= r - mid; j++) { HvwYm.$zE
temp[r - j + 1] = data[j + mid]; `mfq 2bVc
} /UcV
int a = temp[l]; iSLGwTdLn
int b = temp[r]; ,i9Byx#TN
for (i = l, j = r, k = l; k <= r; k++) { . 5y"38e
if (a < b) { ZzGahtx)Y
data[k] = temp[i++]; ym,H@~
a = temp; iRo.RU8>
} else { ;h=*!7:
data[k] = temp[j--]; #FOqP!p.E
b = temp[j]; Cs3^9m6;d
} y;cUl, :v
} zdl%iop3e
} = {'pUU
EI~"L$?
/** .jw}JJ
* @param data {]*x*aa\
* @param l rHge~nY<
* @param i J@pb[OL,
*/ (:V>Hjt
private void insertSort(int[] data, int start, int len) { +ECDD'^!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _Q%vK*n
} ^g1f X1
} S{]7C?4`
} 0-Y:v(|.
} Jq.lT(E8D
O=cxNy-I
堆排序： u6V/JI}g
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package org.rut.util.algorithm.support; n"PJ,ao
[D"t~QMr
import org.rut.util.algorithm.SortUtil; Y}*\[}l:&x
'nQVj
/** 7tM9u5FF
* @author treeroot sZWaV4
* @since 2006-2-2 g>0XxjP4
* @version 1.0 B$3 ?K
*/ $0oO &)*
public class HeapSort implements SortUtil.Sort{ l- pe4x
dCe4u<so\
/* (non-Javadoc) 5<pftTcZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kv,%(en]
*/ hVT~~n`Rj
public void sort(int[] data) { )5j;KI%t
MaxHeap h=new MaxHeap(); V3;.{0k
h.init(data); *_Z#O,
for(int i=0;i h.remove(); #ge)2
System.arraycopy(h.queue,1,data,0,data.length); \@3Qi8u//
} 9Ya<My
w~_;yQ
private static class MaxHeap{ R3)57OyV
[XRCLi}
void init(int[] data){ l+V,DCE
this.queue=new int[data.length+1]; QVF]Ci_=
for(int i=0;i queue[++size]=data; "Td`AuP@,
fixUp(size); 4nH*Ui!T
} `-`qdda
} R+q"_90_
V}d9f2
private int size=0; IKtB;
s]T""-He
private int[] queue; lkyzNy9R
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public int get() { I1X/Lj=
return queue[1]; M<SdPC(+
} &1l=X]%
IKMeJ(:S
public void remove() { #j#_cImE
SortUtil.swap(queue,1,size--); |py6pek|
fixDown(1); uPYmHA}_/
} ANIz,LS
file://fixdown +_v$!@L8
private void fixDown(int k) { W"{v2xi
int j; QB:i/9
while ((j = k << 1) <= size) { #po5_dE\*
if (j < size %26amp;%26amp; queue[j] j++; lf>*Y.!@me
if (queue[k]>queue[j]) file://不用交换 {mWui9 %M
break; [S.ZJUns
SortUtil.swap(queue,j,k); RT93Mt%P
k = j; < v]3g
} <R%;~){
} 6Ao%>;e*
private void fixUp(int k) { LA_3=@2.H
while (k > 1) { JGC=(;
int j = k >> 1; *`j-i
if (queue[j]>queue[k]) _A<u#.yd
break; }?cGf-c
SortUtil.swap(queue,j,k); tt%MoQ)
k = j; A*./,KT
} JOjoiA
} 5Zmw} M
oLWJm
} i{!T&8
xD&^j$Em
} Lb{e,JH
S[tE&[$(p
SortUtil： nf1#tlIJd
IchCACK
package org.rut.util.algorithm; hlu:=<B
,+qVu,
import org.rut.util.algorithm.support.BubbleSort; 22kpl)vbU
import org.rut.util.algorithm.support.HeapSort; 2,lqsd:xM
import org.rut.util.algorithm.support.ImprovedMergeSort; 2([2Pb3<"
import org.rut.util.algorithm.support.ImprovedQuickSort; &U+ _ -Ph
import org.rut.util.algorithm.support.InsertSort; \BWykA>
import org.rut.util.algorithm.support.MergeSort; j1SMeDDM ~
import org.rut.util.algorithm.support.QuickSort; k5kdCC0FCk
import org.rut.util.algorithm.support.SelectionSort; -(`OcGM'L
import org.rut.util.algorithm.support.ShellSort; _3]][a,
{_(\`>
/** as=m`DqOh
* @author treeroot ?[*0+h`en
* @since 2006-2-2 &t5{J53
* @version 1.0 6"c1;P!4
*/ V{|}}b?w?
public class SortUtil { 2tROT][J%
public final static int INSERT = 1; Ladsw
public final static int BUBBLE = 2; Xtwun
public final static int SELECTION = 3; AamVms
public final static int SHELL = 4; =9kN_:-
public final static int QUICK = 5; h._nK\
public final static int IMPROVED_QUICK = 6; k{gLMl
public final static int MERGE = 7; C^QtSha
public final static int IMPROVED_MERGE = 8; ,!V]jP)
public final static int HEAP = 9; @&D?e:|!U
;> m"x
public static void sort(int[] data) { X1ZgSs+i
sort(data, IMPROVED_QUICK); s>0Nr
} [-&L8Un
private static String[] name={ )1g"?]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #fj/~[Ajv
}; 2F%W8Y3
LZ@|9!KDw
private static Sort[] impl=new Sort[]{ & cNy
new InsertSort(), Mv c`)_Md
new BubbleSort(), ;['[?wk
new SelectionSort(), H+ h07\? %
new ShellSort(), ogFKUD*h&>
new QuickSort(), z} '!eCl
new ImprovedQuickSort(), w&4~Q4
new MergeSort(), Mg#j3W}]
new ImprovedMergeSort(), X-Wz:NA
new HeapSort() )otb>w5
}; (HoqR
u*
public static String toString(int algorithm){ p!Eft/A(
return name[algorithm-1]; Q-#$Aa
} kY]W Qu
x.1-)\
public static void sort(int[] data, int algorithm) { &[2U$`P`V
impl[algorithm-1].sort(data); ^\B:R,
} 50dGBF
`Q+moX
public static interface Sort { 6z,&i
public void sort(int[] data); H A}f,),G
} XPB9~::
_= #zc4U
public static void swap(int[] data, int i, int j) { /v095H@
int temp = data; v){ .Z^_C
data = data[j]; /ug8]Lo0
data[j] = temp; xf%4, JQ
} \,!QJp4
} g~UUP4<$"