[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; 6l]jmj)/
} +-~8t^
int i1=l; 2T 3tKX
int i2=mid+1; pse$S=
for(int cur=l;cur<=r;cur++){ N!!=9'fGF
if(i1==mid+1) opsjei@
data[cur]=temp[i2++]; 5QN~^
else if(i2>r) 3w!8PPl
data[cur]=temp[i1++]; "`g5iUHqUl
else if(temp[i1] data[cur]=temp[i1++]; g]&7c:/
else u#!QIQW
data[cur]=temp[i2++]; tf[)Q:|
} +lC?Vpi^
} hhWIwR
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} y/i{6P2`,D
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改进后的归并排序: |?A:[C#X
u+EZ"p;o
package org.rut.util.algorithm.support; xnP@h
7}#zF]vHNi
import org.rut.util.algorithm.SortUtil; B^Sxp=~Au
\.ukZqB3 0
/** f|f)Kys%5
* @author treeroot |ht:_l 8
* @since 2006-2-2 7md,!|m
* @version 1.0 M/?eDW/
*/ &~=FXe0S
public class ImprovedMergeSort implements SortUtil.Sort { +xNV1bM
O]_a$U*6
private static final int THRESHOLD = 10; B703{k
| KtI:n4d
/* IVSOSl|
* (non-Javadoc) ]QC9y:3
* &fofFVQnW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jlp nR#@
*/ Sf*1Z~P|
public void sort(int[] data) { %\"<lyD
int[] temp=new int[data.length]; UahsX
mergeSort(data,temp,0,data.length-1); lT^/8Z<g
} -.xiq0
qXqGhHoe;
private void mergeSort(int[] data, int[] temp, int l, int r) { 2ieyU5q7#
int i, j, k; @cB7tY*Ski
int mid = (l + r) / 2; QjOO^6Fh
if (l == r) QL]e<2oPJ
return; jQBL8<
if ((mid - l) >= THRESHOLD) H#Hhi<2
mergeSort(data, temp, l, mid); iX%9$Bft<
else 7f] qCZ<0V
insertSort(data, l, mid - l + 1); W6gI#
if ((r - mid) > THRESHOLD) uwl_TDc>%
mergeSort(data, temp, mid + 1, r); JAx0(MZO
else x52#md-Z
insertSort(data, mid + 1, r - mid); Ty<."dyPW
&R5zt]4d&
for (i = l; i <= mid; i++) { A=W:}szt]
temp = data; _mWVZ1P
} ]*?lgwE
for (j = 1; j <= r - mid; j++) { {x{~%)-
temp[r - j + 1] = data[j + mid]; 7F2 WmMS
} XEegUTs
int a = temp[l]; ~+ kfb^<-
int b = temp[r]; ]f{3_M[
for (i = l, j = r, k = l; k <= r; k++) { R1$s1@3I|
if (a < b) { v}LI-~M>U
data[k] = temp[i++]; 71n3d~!O>
a = temp; qCkC2Fy(
} else { v]Fw~Y7l!
data[k] = temp[j--]; "%}24t%
b = temp[j]; GXaPfC0-y
} @r&*Qsf|
} 8 XQo
} N TcojA{V$
\5|MW)x
/** KFgq3snH
* @param data $J8g)cS
* @param l / 3eGt7x#
* @param i GQ(*k)'a
*/ \sz*M B
private void insertSort(int[] data, int start, int len) { C(8VXtx_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9>ajhFyOhX
} ayI<-s-
} %oB0@&!mS
} ZIN1y;dJ
} ,eGguNA9
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堆排序： <?nz>vz
kXV;J$1
package org.rut.util.algorithm.support; $Qz<:?D
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import org.rut.util.algorithm.SortUtil; H#i,Ve'
C7O8B;
/** S B~opN
* @author treeroot zLgc j(;
* @since 2006-2-2 5@DCo
* @version 1.0 +e^CL#Gs
*/ E{0e5.{
public class HeapSort implements SortUtil.Sort{ in K]+H]{
+BeA4d8b
/* (non-Javadoc) DIABR%0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0W0GSDx
*/ )DmydyQ'
public void sort(int[] data) { B}S+/V` Y5
MaxHeap h=new MaxHeap(); uI$n7\G!
h.init(data); NN#k^[i1
for(int i=0;i h.remove(); 4> uNH5
System.arraycopy(h.queue,1,data,0,data.length); n}b{u@$
} ^k*%`iQ
[>N#61CV5
private static class MaxHeap{ lz!(OO,g
6cd!;Ca
void init(int[] data){ g$ HL::
this.queue=new int[data.length+1]; No"i6R+
for(int i=0;i queue[++size]=data; @0]w!q
fixUp(size); 0C;Js\>3]
} 8 :WN@
} h/oun2C
Fv7]1EO.
private int size=0; =igTY1|af
^vxx]Hji
private int[] queue; ,,H;2xYf
F!3p )?
public int get() { O1UArD
return queue[1]; R%4Yg(-Q
} @<3E`j'p
Q7<Y5+
public void remove() { oi]XSh[_s
SortUtil.swap(queue,1,size--); gzlxkv-F{
fixDown(1); O&MH5^I
} ;O1jf4y
file://fixdown LofpBO6^
private void fixDown(int k) { b}fC' h
int j; >yr;Y4y7K
while ((j = k << 1) <= size) { /lbj!\~
if (j < size %26amp;%26amp; queue[j] j++; W/\pqH
if (queue[k]>queue[j]) file://不用交换 )H@<A93
break; <jh7G
SortUtil.swap(queue,j,k); -.r"|\1X
k = j; yUWc8]9\W
} D_?Tj
} ZR -RzT1
private void fixUp(int k) { u(FOSmNkN
while (k > 1) { !zt>& t
int j = k >> 1; `-%dHvB^R
if (queue[j]>queue[k]) Cu5_OJ
break; cpl Ny?UIC
SortUtil.swap(queue,j,k); Ux1j+}y
k = j; -8l(eDm"m
} Gk+R,:
} sZ~03QvkT
|||m5(`S
} ^mjU3q{;
@Co6$<
} $3B%4#s
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SortUtil： %f'=9pit
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package org.rut.util.algorithm; _p0gXb1m`
!@])Ut@tN
import org.rut.util.algorithm.support.BubbleSort; 0ETT@/)]z
import org.rut.util.algorithm.support.HeapSort; w&f>VB~,1
import org.rut.util.algorithm.support.ImprovedMergeSort; CVvl &on
import org.rut.util.algorithm.support.ImprovedQuickSort; W4$aX5ow$
import org.rut.util.algorithm.support.InsertSort; S!#5
import org.rut.util.algorithm.support.MergeSort; 4i.&geXA.
import org.rut.util.algorithm.support.QuickSort; @54$IhhT~
import org.rut.util.algorithm.support.SelectionSort; x&^Xgi?
import org.rut.util.algorithm.support.ShellSort; M*bsA/Z
j94~cYV
/** L-)ZjXzk
* @author treeroot EcX7wrl9x
* @since 2006-2-2 34X]b[^
* @version 1.0 eI:x4K,#
*/ nTc#I~\
public class SortUtil { -~aG_Bp!($
public final static int INSERT = 1; Q|P M6ta
public final static int BUBBLE = 2; WMnSkO
public final static int SELECTION = 3; W!T[ ^+
public final static int SHELL = 4; s-5#P,Lw
public final static int QUICK = 5; r>! @Z2%s
public final static int IMPROVED_QUICK = 6; 9(qoME}>=
public final static int MERGE = 7; ftcLP
public final static int IMPROVED_MERGE = 8; q+4dHS)x
public final static int HEAP = 9; 5x|$q kI
p#Po?
public static void sort(int[] data) { Q=d:Yz":S
sort(data, IMPROVED_QUICK); /s%-c!o^
} )X," NJG
private static String[] name={ "=K3sk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V~#5^PF{
}; I L7kpH+y
Du +_dr^4
private static Sort[] impl=new Sort[]{ "=+i~N#Sc
new InsertSort(), WF*j^ %5
new BubbleSort(), ?$ov9U_
new SelectionSort(), ~:k r;n2
new ShellSort(), )7!,_r
new QuickSort(), TghT{h@
new ImprovedQuickSort(), <$hv{a
new MergeSort(), 0sA`})Dk
new ImprovedMergeSort(), E+EcXf
new HeapSort() l%('5oz@\
}; \1&4wzT
{>vgtkJ
public static String toString(int algorithm){ @aN~97 H\
return name[algorithm-1]; ZvQZD=,F
} 7Y-Q, ?1
uH?4d!G
public static void sort(int[] data, int algorithm) { #g@4c3um|
impl[algorithm-1].sort(data); x^_c4,i)
} a!4p$pR
nu:l;+,VY
public static interface Sort { cUP1Uolvn
public void sort(int[] data); h5T~dGRlR
} Yc?S<
!-n*]C
public static void swap(int[] data, int i, int j) { >);M\,1\I
int temp = data; B5+Q%)52
data = data[j]; g$mMH
data[j] = temp; bC"h7$3
} Ac{TqiIv
} 2Mq@5n