[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; lpM{@JC
} UmuFzw^
int i1=l; fh3 6
int i2=mid+1; O^$Zz<
for(int cur=l;cur<=r;cur++){ m{yON&y
if(i1==mid+1) syfR5wc
data[cur]=temp[i2++]; Bx)&MYY}[[
else if(i2>r) 4%7*tVG
data[cur]=temp[i1++]; -XyuA:pxx
else if(temp[i1] data[cur]=temp[i1++]; H}~^,B2;
else .KSGma6]
data[cur]=temp[i2++]; ?!66yn
} `qgJE_GC
} OgnpzN
K!~](_W!
} ?n+\T'f!
}>:X|4]
改进后的归并排序: TK>}$.c%+
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package org.rut.util.algorithm.support; T{M:)}V
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import org.rut.util.algorithm.SortUtil; Ye6O!,R
*~L]n4-
/** y_&XF>k91
* @author treeroot X9j+$X\j
* @since 2006-2-2 =R"tnjR
* @version 1.0 $gTPW,~s[
*/ 5S?yj
public class ImprovedMergeSort implements SortUtil.Sort { m t^1[
}{y$$X<:
private static final int THRESHOLD = 10; BSf"'0I&
u\wd<<I']
/* \nWpV7TSN
* (non-Javadoc) p'4P2
* A&'%ou
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M2S|$6t:
*/ yw<xv-Q=i
public void sort(int[] data) { D=vq<X'
int[] temp=new int[data.length]; -tdG}Gu
mergeSort(data,temp,0,data.length-1); wp*1HnWj8Y
} ( -@>
do,X{\
private void mergeSort(int[] data, int[] temp, int l, int r) { LfApVUm
int i, j, k; S@)bl
int mid = (l + r) / 2; XEEbmIO*<9
if (l == r) OEW,[d
return; H/&Q,9sU21
if ((mid - l) >= THRESHOLD) buXG32;
mergeSort(data, temp, l, mid); ?OyW|jL
else (c2\:hvy
insertSort(data, l, mid - l + 1); ,gc#N
if ((r - mid) > THRESHOLD) cg%CYV)
mergeSort(data, temp, mid + 1, r); WU\bJ}
else W|e>
insertSort(data, mid + 1, r - mid); ($W 5fbu
gEsR-A!m
for (i = l; i <= mid; i++) { j[cjQ]>~'
temp = data; i#=X#_ +El
} @k,(i=**
for (j = 1; j <= r - mid; j++) { 7p$*/5fk
temp[r - j + 1] = data[j + mid]; #O+]ydvT
} #^ #i]{g
int a = temp[l]; ZB&Uhi
int b = temp[r]; Rp*t"HSaAW
for (i = l, j = r, k = l; k <= r; k++) { ^nF$<#a
if (a < b) { jYz3(mM'J
data[k] = temp[i++]; )}!'VIe^!
a = temp; eb\`)MI/
} else { uek3Y[n
data[k] = temp[j--]; G |^X:+
b = temp[j]; |GQ$UB
} |lwN!KVQ,
} JrTBe73.]j
} fZfiiE~7J
5qEdN
/** F`.7_D
* @param data 4/WCs$
* @param l QB,ad
* @param i 2v1&%x:y#
*/ -Wk"o?}q
private void insertSort(int[] data, int start, int len) { *XOKH+_u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MlE~gCD
} h';v'"DoW`
} e&4u^'+K
} CD[=z)<z{
} dRa<,@1"
gDNW~?/
堆排序： 66^t[[
^)l@7XxD
package org.rut.util.algorithm.support; 63Yu05'
qXGLv4c`Q
import org.rut.util.algorithm.SortUtil; )\Q|}JV
~|C1$.-
/** {~g
* @author treeroot iQC&d_#
* @since 2006-2-2 *8H;KGe=
* @version 1.0 9z/_`Xd_
*/ UO<claV
public class HeapSort implements SortUtil.Sort{ R7c)C8/~
*AR<DXEL
/* (non-Javadoc) -yGm^EwP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1>y=i+T/b
*/ /,Id_TTCO
public void sort(int[] data) { 'a?.X _t
MaxHeap h=new MaxHeap(); $ow`)?sh
h.init(data); F)kLlsp
for(int i=0;i h.remove(); F)ld@Ydk=
System.arraycopy(h.queue,1,data,0,data.length); mm<iT59
} #@s~V<rW
<" l;l~Y1
private static class MaxHeap{ , %O3^7i
VDjIs UUX
void init(int[] data){ +/86w59
this.queue=new int[data.length+1]; 1|w:xG^
for(int i=0;i queue[++size]=data; ?Hxgx
fixUp(size); q.[[c
} rOr1H!
} [W=S8>
6_K#,_oZ
private int size=0; aEdJri
b\m(0/x
private int[] queue; kdPm # $-
w!w _`7[
public int get() { n12c075
return queue[1]; P\6T4s
} ^GaPpm
~.`r(
public void remove() { Ny7=-]N4{"
SortUtil.swap(queue,1,size--); nL07^6(
fixDown(1); OVSq8?L
} Le:mMd= G
file://fixdown qq3Qd,$Z
private void fixDown(int k) { U]EuDNkO{
int j; zRE8299%z
while ((j = k << 1) <= size) { UA4d|^ev
if (j < size %26amp;%26amp; queue[j] j++; 4?M3#],'h
if (queue[k]>queue[j]) file://不用交换 Xb:BIp!e
break; u4M2Ec
SortUtil.swap(queue,j,k); C{i;spc!bi
k = j; #]a51Vss
} vek:/'sj3p
} JK]tcP
private void fixUp(int k) { +Z~!n
while (k > 1) { `$agM@"^
int j = k >> 1; f%[ukMj&
if (queue[j]>queue[k]) o]jP3 $t;
break; UMi`u6#
SortUtil.swap(queue,j,k); gIM'bA<~
k = j; 9.OwH(Ax7
} jy@i(@Z
} G$|;~'E
J}_Dpb[L
} ,3--ERf
,!%R5*?=D
} 8Y~=\(5>
SLjf<.S
SortUtil： 7O9hn2?e
^zPEAXm
package org.rut.util.algorithm; (yAvDyJOn
o"}&qA;
import org.rut.util.algorithm.support.BubbleSort; n.XhK_6n]M
import org.rut.util.algorithm.support.HeapSort; 4J 51i*`
import org.rut.util.algorithm.support.ImprovedMergeSort; dtnet_j
import org.rut.util.algorithm.support.ImprovedQuickSort; ^C)TM@+
import org.rut.util.algorithm.support.InsertSort; >g"M.gW
import org.rut.util.algorithm.support.MergeSort; [gns8F#H\
import org.rut.util.algorithm.support.QuickSort; Y0fO.k#C^
import org.rut.util.algorithm.support.SelectionSort; !a&SB*%^I3
import org.rut.util.algorithm.support.ShellSort; #!u51P1
SP?U@w%}
/** chMc(.cN0
* @author treeroot fDEu%fUYZ
* @since 2006-2-2 }Wche/g`
* @version 1.0 3)c K*8#
*/ PWN'.HQ
public class SortUtil { ;,vL
public final static int INSERT = 1; P9TBQW2G{
public final static int BUBBLE = 2; ^0tf1pV2
public final static int SELECTION = 3; O:^LQ
public final static int SHELL = 4; zPh\3B
public final static int QUICK = 5; 5H:~6z
public final static int IMPROVED_QUICK = 6; =_m9so
public final static int MERGE = 7; }wOpPN[4
public final static int IMPROVED_MERGE = 8; :{WrS
public final static int HEAP = 9; 'bI~61{A
}B9~X
public static void sort(int[] data) { P&%eIgAOL
sort(data, IMPROVED_QUICK); "(\) &G
} =i^<a7M~
private static String[] name={ 4,F3@m:<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cq*}b4^;
}; 9kX=99kf[
=e!l=d|/
private static Sort[] impl=new Sort[]{ )dIfr
new InsertSort(), g?[&0r1
new BubbleSort(), Ph+X{|
new SelectionSort(), oAZF3h]po
new ShellSort(), lHKf#|
new QuickSort(), -?YTQ@ W
new ImprovedQuickSort(), d=Df.H+3
new MergeSort(), pba8=Z
new ImprovedMergeSort(), 7.e7Fi{
new HeapSort() Vl 19Md
}; 95^i/6Gl!P
Gkv~e?Kc~^
public static String toString(int algorithm){ \SiHrr5
return name[algorithm-1]; S2 "=B&,}
} Y%0d\{@a
=0PRAc
public static void sort(int[] data, int algorithm) { w&|R5Q
impl[algorithm-1].sort(data); "o{)X@YN]
} I& M36f
jH&_E'XMX
public static interface Sort { _))I.c=v
public void sort(int[] data); QOV}5 0
} jkF+g$B
H\| ]!8w5Z
public static void swap(int[] data, int i, int j) { V'"I9R'1
int temp = data; K/2.1o;9
data = data[j]; {;&B^uz ]
data[j] = temp; UIf ZPf=
} JS/M~8+Et
} S~k*r{?H})