[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; x/,;:S
} 12 p`ZD=
int i1=l; 9E7G%-
int i2=mid+1; t}+/GSwT
for(int cur=l;cur<=r;cur++){ TpU\IQ
if(i1==mid+1) tF;0P\i
data[cur]=temp[i2++]; =Jm[1Mgt
else if(i2>r) ^s)`UZ<C=
data[cur]=temp[i1++]; W9SU1{*9
else if(temp[i1] data[cur]=temp[i1++]; 0? {ADQz
else 4*EMd!E=<
data[cur]=temp[i2++]; ,YD7p= PY
} kjYM&q
} Dg&6@c|
x^1udK^re
} MblRdj6
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改进后的归并排序: x2!R&q8U>
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package org.rut.util.algorithm.support; U9oUY> 9
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import org.rut.util.algorithm.SortUtil; <-I69`
--$* q"
/** %bnXZA2Sx
* @author treeroot svpQ.Q
* @since 2006-2-2 H<d~AurX)J
* @version 1.0 7d;|?R-8D
*/ HzTmNm)
public class ImprovedMergeSort implements SortUtil.Sort { ,AnD%#o
6b|<$Je9
private static final int THRESHOLD = 10; R`(2Fy%0\k
9KVJk</:n
/* l<6GZ
* (non-Javadoc) >.meecE?Q
* 33oW3vS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c}(H*VY2n
*/ Z- feMM
public void sort(int[] data) { C8m9H8Qm
int[] temp=new int[data.length]; b,'O|s]"Sc
mergeSort(data,temp,0,data.length-1); 01A{\O1$j
} 6H|1IrG
S;4:`?s=i
private void mergeSort(int[] data, int[] temp, int l, int r) { HLWffO/
int i, j, k; <Kt_ oxK,
int mid = (l + r) / 2; NzgG77>
if (l == r) A3eCI
return; yd;e;Bb7*
if ((mid - l) >= THRESHOLD) #RlZxtx.O
mergeSort(data, temp, l, mid); ! I:N<
else kX8C'D4 gX
insertSort(data, l, mid - l + 1); ZJ3g,dc
if ((r - mid) > THRESHOLD) -#ZvjEaey
mergeSort(data, temp, mid + 1, r); PYCN3s#Gi
else x7S\-<8
insertSort(data, mid + 1, r - mid); !Gmnck&+
V,-we|"
for (i = l; i <= mid; i++) { x3y+=aj
temp = data; Tz1^"tx9
} i(4<MB1a
for (j = 1; j <= r - mid; j++) { =Dn<DV
temp[r - j + 1] = data[j + mid]; !Se0&Ob
} %#2$B+
int a = temp[l]; 03~ ADj
int b = temp[r]; D,")n75
for (i = l, j = r, k = l; k <= r; k++) { 9,?~dx
if (a < b) { WE\TUENac(
data[k] = temp[i++]; I[?\Or
a = temp; nXT`7
} else { yXU.PSG*
data[k] = temp[j--]; nQc,^A)I
b = temp[j]; +4 k=Y
} 'D21A8*N
} {;{U@Z
} rI>x'0Go*
pwFdfp
/** c{=;lT
* @param data -`faXFW'
* @param l 9L>?N:%5
* @param i :;_ khno
*/ :9hGL
private void insertSort(int[] data, int start, int len) { (4FVemgy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x_Ev2 c'4
} @;egnXxF<
} =gj?!d`
} ?oYO !
} IAO5li3
5_(\Cd<#
堆排序： `vBBJ@f4)
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package org.rut.util.algorithm.support; QXb2jWz
W1REF9i){
import org.rut.util.algorithm.SortUtil; p]kEH\ sh
@_do<'a
/** }#^Cj;
* @author treeroot ?F05BS#)X
* @since 2006-2-2 7eCjp
* @version 1.0 O h@z<1eYZ
*/ Em!- W5*s
public class HeapSort implements SortUtil.Sort{ E&8Nh J
i)x0]XF
/* (non-Javadoc) ov+{<0Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wep^He\:
*/ |u>V> PN
public void sort(int[] data) { v.]{b8RR
MaxHeap h=new MaxHeap(); k-ZO/yPo
h.init(data); ,-6Oma -
for(int i=0;i h.remove(); :|bL2T@>[
System.arraycopy(h.queue,1,data,0,data.length); vm@V5oH
} ) ^En
rD}g9?ut
private static class MaxHeap{ T 6D+@i
boojq{cvYA
void init(int[] data){ 3H,x4L5j
this.queue=new int[data.length+1]; `Abd=1nH
for(int i=0;i queue[++size]=data; LGhK)]:
fixUp(size); x'L=p01
} OJm ]gb7
} @\?HlGWEf
m.+h@
private int size=0; <N)!s&D
Gi)Vr\Q.
private int[] queue; "lt<$.
sTd@/>S?p
public int get() { t~L4wr{B
return queue[1]; J_7w_T/
} E`j' <#V!
oL]uY5eZoe
public void remove() { BvP\c_
SortUtil.swap(queue,1,size--); <6(0ZO%,C!
fixDown(1); 0BXr[%{`
} eay|>xa2
file://fixdown Un]wP`
private void fixDown(int k) { 5M=U*BI
int j; DQ8/]Z{H
while ((j = k << 1) <= size) { 0h1u W26^
if (j < size %26amp;%26amp; queue[j] j++; Y*BmBRN
if (queue[k]>queue[j]) file://不用交换 Jh.~]\u
break; k@7#8(3
SortUtil.swap(queue,j,k); w>B}w
k = j; 2q[pOT'k
} E7O3$B8
} fnX[R2KZ
private void fixUp(int k) { fd4gB6>
while (k > 1) { !/,oQoG
int j = k >> 1; x{;{fMN1
if (queue[j]>queue[k]) 5$ik|e^:y
break; u4hn9**a1
SortUtil.swap(queue,j,k); o%'1=d3R1Q
k = j; YXp\C"~g
} vN(~}gOd\
} G/JGb2I/7|
uBts?02
} bkdXBCBx?
5ih>x3S1/
} +[ ?!@)
` +YtTK
SortUtil： <Z.`X7]Uk
hj1;f<' U
package org.rut.util.algorithm; 8(Az/@=n
~g!!#ad
import org.rut.util.algorithm.support.BubbleSort; p*PzfSLN
import org.rut.util.algorithm.support.HeapSort; N~]qQoj,
import org.rut.util.algorithm.support.ImprovedMergeSort; +Kgl/Wg%
import org.rut.util.algorithm.support.ImprovedQuickSort; 62ru%<x=
import org.rut.util.algorithm.support.InsertSort; IN/$b^Um
import org.rut.util.algorithm.support.MergeSort; 4Wgzp51Aq!
import org.rut.util.algorithm.support.QuickSort; 9<3( QR
import org.rut.util.algorithm.support.SelectionSort; Tbm ~@k(C
import org.rut.util.algorithm.support.ShellSort; !BVCuuM>w
K1X-<5]{
/** Y-})/zFc
* @author treeroot X QLP|v;"
* @since 2006-2-2 U LS>v
* @version 1.0 "81'{\(I_
*/ At@0G\^
public class SortUtil { rd&d~R6
public final static int INSERT = 1; $W|JQ h
public final static int BUBBLE = 2; '|gsmO
public final static int SELECTION = 3; 7l7VT?<:
public final static int SHELL = 4; &/[MWQ
public final static int QUICK = 5; T"P}`mT
public final static int IMPROVED_QUICK = 6; HKbV@NW
public final static int MERGE = 7; R'Ue>k
public final static int IMPROVED_MERGE = 8; 6{;6~?U
public final static int HEAP = 9; /{l_tiE7
;R6f9tu2
public static void sort(int[] data) { m|fcWN[
sort(data, IMPROVED_QUICK); AO`@&e]o
} XcNL\fl1
private static String[] name={ "<|KR{/+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1M`>;fjYa
}; <SJ6<'
7[=G;2<
private static Sort[] impl=new Sort[]{ n`^jNXE
new InsertSort(), ,JI]Eij^
new BubbleSort(), #8XmOJ"W3k
new SelectionSort(), 1$DcE>
new ShellSort(), oC" [rn
new QuickSort(), {$EX :ID
new ImprovedQuickSort(), s2L]H
new MergeSort(), 5 v.&|[\k
new ImprovedMergeSort(), A'CD,R+gR
new HeapSort() 3]1 !g6
}; '?$@hqQn
|?jgjn&RQ
public static String toString(int algorithm){ `<>#;%
return name[algorithm-1]; }o]}R#|
} A)~oD_ooQ
V(kK2az
public static void sort(int[] data, int algorithm) { N^B7<~ bD
impl[algorithm-1].sort(data); ;S^"Y:7)
} \ o2oQ3
KPy)%i
public static interface Sort { (@NILK
public void sort(int[] data); ,>#\aO1n
} o,j_eheAM
4w|t|?
public static void swap(int[] data, int i, int j) { Mh3.GpS
int temp = data; ?IeBo8
data = data[j]; t$qIJt$
data[j] = temp; PJ:!O?KVq
} j+'ua=T3
} O:I]v@