[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; l",X
} VxqoE]Dh
int i1=l; & oj$h
int i2=mid+1; Mq Q'Kjo
for(int cur=l;cur<=r;cur++){ |576)
if(i1==mid+1) s#4Q?<65u
data[cur]=temp[i2++]; Rxl/)H[Lc"
else if(i2>r) #'fQx`LV
data[cur]=temp[i1++]; g=Bge)
else if(temp[i1] data[cur]=temp[i1++]; T_I ApC
else \o<&s{6L
data[cur]=temp[i2++]; /=gU
} = 6.i.(L_S
} byN4?3F
HbMD5(
} `^'0__<M
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改进后的归并排序: P:k!dRb9{
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package org.rut.util.algorithm.support; VX,@Gp_'m
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import org.rut.util.algorithm.SortUtil; 7z9[\]tt
@tVl8]y
/** -}KW"#9c
* @author treeroot b.mWB`59
* @since 2006-2-2 9HG"}CGZP
* @version 1.0 5O]eD84B
*/ XEb+Z7L1
public class ImprovedMergeSort implements SortUtil.Sort { >gZ"^iW
<I.{meDg
private static final int THRESHOLD = 10; m?O"LGBB=
2|D<0d#W
/* y2:Bv2}
* (non-Javadoc) YE[{Y(5;q
* U{ZKxE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F0tx.]uS
*/ drd5oZ
public void sort(int[] data) { OJ,Z
int[] temp=new int[data.length]; `V=F>s$W
mergeSort(data,temp,0,data.length-1); 2,e>gP\]
} n+w$'l
yPT\9"/
private void mergeSort(int[] data, int[] temp, int l, int r) { S)W(@R+@4
int i, j, k; ggHz-oNY
int mid = (l + r) / 2; (tzfyZ M
if (l == r) 0s%]%2ON
return; ;`rz]7,*
if ((mid - l) >= THRESHOLD) ,Laz515
mergeSort(data, temp, l, mid); $##LSTA
else F?hGt]o
insertSort(data, l, mid - l + 1); Dt Ry%fA_
if ((r - mid) > THRESHOLD) LT6VZ,S
mergeSort(data, temp, mid + 1, r); 3TF'[(K=
else T74."Lo#
insertSort(data, mid + 1, r - mid); ({9P, D~2
],w+4;+
for (i = l; i <= mid; i++) { }`D-]/T8.
temp = data; gtJCvVj>g
} c2Up<#t
for (j = 1; j <= r - mid; j++) { d1hXzJs
temp[r - j + 1] = data[j + mid]; g<5G#
} [A46WF>L
int a = temp[l]; U?(+ {4l
int b = temp[r]; <:I]0|[
for (i = l, j = r, k = l; k <= r; k++) { =(Wl'iG
if (a < b) { am#(ms
data[k] = temp[i++]; u%rB]a$/
a = temp; (m&''yaH
} else { ~_W>ND
data[k] = temp[j--]; xT;j_'9U;
b = temp[j]; y>|AX/n
} A^@,Ha
} ZA8FX
} K])| V
X2to](\%X
/** -`d(>ok
* @param data zR_yxs'
* @param l O`FuXB(t
* @param i Zm#qW2a]P
*/ Y"'k $jS-
private void insertSort(int[] data, int start, int len) { VDC"tSQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {6brVN.V
} }I ^e:,{
} H`Ld,E2ex&
} vp..>BMJ
} Wkc^?0p
VO+3@d:
堆排序： ["XS|"DM
OvtiFN^s'
package org.rut.util.algorithm.support; =%R|@lz_x
f f_| 3G
import org.rut.util.algorithm.SortUtil; $-;x8O]u
A3mSSc6
/** k80!!S=_>
* @author treeroot l$eKV(CZ4
* @since 2006-2-2 77o&$l,A|
* @version 1.0 `%Uz0hF
*/ ?KtvXTy{m
public class HeapSort implements SortUtil.Sort{ ~ZXAW~a}
7T@"2WYat
/* (non-Javadoc) ~AG."<}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u@$pOLI
*/ j aq/]I7
public void sort(int[] data) { ljRR{HOl
MaxHeap h=new MaxHeap(); qr[+^*Ha
h.init(data); DU.[Sp
for(int i=0;i h.remove(); R22P ol
System.arraycopy(h.queue,1,data,0,data.length); +Y|HO[
} *r]Mn~3
Ax"I$6n>
private static class MaxHeap{ h2#S ?
W(&9S[2
void init(int[] data){ rkC6-9V
this.queue=new int[data.length+1]; P g1EE"N@
for(int i=0;i queue[++size]=data; AC9#!# OGB
fixUp(size); mB]Y;R<
} >Gyg`L\
} {uuvgFC
I6,sN9` K
private int size=0; 6mbHfL>cO
d( +E0
private int[] queue; XG_Iq ,
kFF)6z:2
public int get() { W_z?t;
return queue[1]; ^7&0Pm
} -(YdK8
{ei,>5K
public void remove() { Je~d/,^WU
SortUtil.swap(queue,1,size--); b(McH*_8e
fixDown(1); \qh -fW; #
} ;Z(~;D
file://fixdown hSyA;*)U
private void fixDown(int k) { U?:<clh
int j; IRW%*W#
while ((j = k << 1) <= size) { J((.zLvz
if (j < size %26amp;%26amp; queue[j] j++; 9QryW\6.@z
if (queue[k]>queue[j]) file://不用交换 'L0{Ed+9
break; UCP4w@C
SortUtil.swap(queue,j,k); `nDgwp:b"
k = j; 1*Ui=M4
} Ug|o($CY
} C5jR||
private void fixUp(int k) { )wwQv2E
while (k > 1) { X[ o9^<
int j = k >> 1; "x$RTuWA9
if (queue[j]>queue[k]) wf8GH}2A
break; -O=a"G=
SortUtil.swap(queue,j,k); (iZE}qf7g
k = j; X@ Gm:6
} I=3e@aTZ,
} uY;2tZldf=
{%;KkC8=R
} jW-j+WGSM
(SlrV8;
} gB?~!J?
~CB6+t>
SortUtil： iEf6oM
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package org.rut.util.algorithm; >r"~t70C~]
}Rc8\,
import org.rut.util.algorithm.support.BubbleSort; SEc3`y;j%
import org.rut.util.algorithm.support.HeapSort; S6sw)
import org.rut.util.algorithm.support.ImprovedMergeSort; \KaWR
import org.rut.util.algorithm.support.ImprovedQuickSort; R.EA5X|_
import org.rut.util.algorithm.support.InsertSort; )A4WK+yD$z
import org.rut.util.algorithm.support.MergeSort; zaVDe9B,7
import org.rut.util.algorithm.support.QuickSort; |ei?s1)
import org.rut.util.algorithm.support.SelectionSort; aQEMCWxZ
import org.rut.util.algorithm.support.ShellSort; J0U9zI4
+{j? +4(B
/** L:y} L
* @author treeroot syYg, G[
* @since 2006-2-2 Hop$w
* @version 1.0 <4W"ne28
*/ AE)<ee%\\
public class SortUtil { m$xyUv1
public final static int INSERT = 1; xwj%X%2
public final static int BUBBLE = 2; dsP1Zq
public final static int SELECTION = 3; !(hP{k ^g
public final static int SHELL = 4; {daNw>TH
public final static int QUICK = 5; h !~u9
public final static int IMPROVED_QUICK = 6; O]n"aAu@
public final static int MERGE = 7; nNIV(
public final static int IMPROVED_MERGE = 8; [Pdm1]":(
public final static int HEAP = 9; cf|<~7
'wAOY
public static void sort(int[] data) { =$g8"[4
sort(data, IMPROVED_QUICK); 22|f!la8n
} rSD!u0c[
private static String[] name={ |Mp_qg?g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j:0VtJo~
}; [ed%"f
HB$*xS1
private static Sort[] impl=new Sort[]{ >,`/ z
new InsertSort(), Tv0|e'^
new BubbleSort(), Hm+-gI3*
new SelectionSort(), ,XW6W&vR;
new ShellSort(), Lrr^obc
new QuickSort(), 2k[i7Rl \c
new ImprovedQuickSort(), '!!w|kd
new MergeSort(), *_$%Tv.]
new ImprovedMergeSort(), buRXzSR
new HeapSort() )Xa`LG=|
}; vL13~q*F
}}?L'Vby
public static String toString(int algorithm){ A>$VkGo
return name[algorithm-1]; i_4FxC4
} r6Z&i^cMe
}(-R`.e;
public static void sort(int[] data, int algorithm) { #Xri%&~
impl[algorithm-1].sort(data); ke~O+]
} _y)#N<
mj<(qZh
public static interface Sort { {W}.z
public void sort(int[] data); %#NaM\=8v
} sb_>D`>
!>/U6h,_
public static void swap(int[] data, int i, int j) { i6r%;ueLb
int temp = data; Xt/T0.I
data = data[j]; iLy}G7h
data[j] = temp; 9c806>]U^
} '=x
} S,vrz!'>A