[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; s7)# NT2
} 8-g$HXqs_#
int i1=l; xzf)_ <
int i2=mid+1; T?}=k{C]
for(int cur=l;cur<=r;cur++){ "F.J>QBd
if(i1==mid+1) h|/*yTuN.y
data[cur]=temp[i2++]; Rx"VscB6z
else if(i2>r) cF<DUr)Ve
data[cur]=temp[i1++]; xyJgHbml
else if(temp[i1] data[cur]=temp[i1++]; <wGTs6
else XkfUPbU
data[cur]=temp[i2++]; f.xSr!
} r@V(w`
} D]>86&
T6?d`i i1
} 6V_5BpXt
Pc:'>,3!V3
改进后的归并排序: ~(doy@0M
Z_ *ZUN?B
package org.rut.util.algorithm.support; w7ABnX
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import org.rut.util.algorithm.SortUtil; ;>hPHx
>a] s
/** H-y-7PW*~
* @author treeroot oO9iB:w
* @since 2006-2-2 PL B=%[
* @version 1.0 ++RmaZ
*/ sVl:EVv
public class ImprovedMergeSort implements SortUtil.Sort { 'A@Oia1;{
C g,w6<7
private static final int THRESHOLD = 10; %RF
BOcEL%+
/* )UU6\2^
* (non-Javadoc) &(U=O?r7
* Ita!07
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M(f*hOG{Y
*/ / z>8XM&
public void sort(int[] data) { rO>wX_
int[] temp=new int[data.length]; (YH{%8 Z0
mergeSort(data,temp,0,data.length-1); #2t\>7]
} V\lF:3C
"%iR-s_>
private void mergeSort(int[] data, int[] temp, int l, int r) { nLLHggNAV
int i, j, k; C4d1*IQk
int mid = (l + r) / 2; OpX
if (l == r) ~CTRPH
return; w5G34[v
if ((mid - l) >= THRESHOLD) vP;tgW9Qk
mergeSort(data, temp, l, mid); j3'/jk]\
else ^Q+5M"/8
insertSort(data, l, mid - l + 1); @ShJ:
if ((r - mid) > THRESHOLD) j{+I~|ZB,
mergeSort(data, temp, mid + 1, r); H;}ue
else x~,?Zj)n?C
insertSort(data, mid + 1, r - mid); ll^O+>1dO
e/I{N0SR
for (i = l; i <= mid; i++) { o~N-x*
temp = data; 6*oTT(0<p
} vb2O4%7tw
for (j = 1; j <= r - mid; j++) { |"&4"nwa
temp[r - j + 1] = data[j + mid]; Olrw>YbW
} ~x#-#nuh"
int a = temp[l]; ep1Ajz.l
int b = temp[r]; g(/O)G.
for (i = l, j = r, k = l; k <= r; k++) { Z19y5?uR
if (a < b) { lt2&uYgp
data[k] = temp[i++]; ^g"6p#S=n
a = temp; ]o[HH_`s@
} else { Wl"fh_
data[k] = temp[j--]; i; uM!d}
b = temp[j]; ;Awzm )Q
} ;{u#~d}
} ( I~XwP&
} 8#3cmpx4
b8Ad*f\
/** }{PtQc6RL!
* @param data ~oyPmIcb
* @param l W| eG}`
* @param i Hd}t=6
*/ ^8t*WphZC
private void insertSort(int[] data, int start, int len) { M4]|(A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1Ee>pbd
} C8SNSeg
} dNmX<WXG
} n m$G4Q
} ?AH<y/i<Y
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堆排序： D'=`O6pK
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package org.rut.util.algorithm.support; r!=VV!XZ
g9`ytWmM
import org.rut.util.algorithm.SortUtil; #_5+kBA+>'
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/** 'Pn`V{a
* @author treeroot W#/Ol59
* @since 2006-2-2 +1A<kJ
* @version 1.0 .h }D%Qa
*/ cA^7}}?e
public class HeapSort implements SortUtil.Sort{ XBBRB<l)
TMs\#
/* (non-Javadoc) lKSI5d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \p|!=H@
*/ T{Q&}`D)r
public void sort(int[] data) { <i?-x&Q?=
MaxHeap h=new MaxHeap(); @J)vuGS
h.init(data); &0blHDMj{#
for(int i=0;i h.remove(); (6aZQ`H
System.arraycopy(h.queue,1,data,0,data.length); uSbg*OA
} }gt~{9?c
,4UJ|D=J
private static class MaxHeap{ 3`I_
rGO3
void init(int[] data){ d":{a6D*d
this.queue=new int[data.length+1]; 'f!Jh<i
for(int i=0;i queue[++size]=data; ;bbEd'
fixUp(size); ,1kV9_x
} ~-zC8._w3r
} b s*Z{R
43fA;Uc{Y`
private int size=0; CbQ%[x9|
@5ybBh]
private int[] queue; <>GyG-q
n*uZ=M_/Q
public int get() { Melc-[
return queue[1]; suSIz 7:
} !Hg#c!eOg
j_g9RmZT
public void remove() { F3'G9Xf8Q=
SortUtil.swap(queue,1,size--); (x!bZ,fu
fixDown(1); M?`06jQD.
} n40Z
file://fixdown Plv+mb
private void fixDown(int k) { w9BH>56/"
int j; h)8_sC
while ((j = k << 1) <= size) { &kE|~i:=,9
if (j < size %26amp;%26amp; queue[j] j++; oE&[W>,x
if (queue[k]>queue[j]) file://不用交换 C,rZ}-
break; 7]Yd-vA
SortUtil.swap(queue,j,k); iE5^Xik,
k = j; `VbG%y&I
} .:/@<V+K
} q\"$~*
private void fixUp(int k) { N"{o3QmA
while (k > 1) { V-|}.kOH2
int j = k >> 1; '`"&RuB
if (queue[j]>queue[k]) F'!}$oT"
break; %Z|*!A+wN5
SortUtil.swap(queue,j,k); V _,*
k = j; SfR_#"Uu
} }#M|3h;q9+
} TjdYCk]'
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} xg&vZzcl
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} M`FL&Ac
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SortUtil： 8Sa<I.l
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package org.rut.util.algorithm; `x3c},'@k
&~EOM
import org.rut.util.algorithm.support.BubbleSort; :Vc9||k
import org.rut.util.algorithm.support.HeapSort; FS0SGBo
import org.rut.util.algorithm.support.ImprovedMergeSort; )1ciO+_
import org.rut.util.algorithm.support.ImprovedQuickSort; ~Gza$ K
import org.rut.util.algorithm.support.InsertSort; *np|PyLP:
import org.rut.util.algorithm.support.MergeSort; 'u~use"
import org.rut.util.algorithm.support.QuickSort; ty ?y&~axk
import org.rut.util.algorithm.support.SelectionSort; 5Ml}m
import org.rut.util.algorithm.support.ShellSort; k,J?L-F
4{&
/** UWp(3FQ
* @author treeroot K[H$qJmPX
* @since 2006-2-2 Hl51R"8o
* @version 1.0 R !HL+
*/ `7`iCYiTy
public class SortUtil { 9,IGZ55C
public final static int INSERT = 1; v?rN;KY#pK
public final static int BUBBLE = 2; b~-9u5.L1
public final static int SELECTION = 3; .W\Fa2}%av
public final static int SHELL = 4; ~rD* Y&#.
public final static int QUICK = 5; F/h)azcn
public final static int IMPROVED_QUICK = 6; ]v#Q\Q8>
public final static int MERGE = 7; ul E\>5O4h
public final static int IMPROVED_MERGE = 8; G9jtL$}E<
public final static int HEAP = 9; i*3'O:Gq
Y|",.~
public static void sort(int[] data) { *KNR",.
sort(data, IMPROVED_QUICK); PeOgXg)L`z
} %rkUy?=vu
private static String[] name={ 98l#+4+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" | =&r) ~
}; pdM|dGq^
|"arVde
private static Sort[] impl=new Sort[]{ }0I! n@
new InsertSort(), 5we1q7
new BubbleSort(), q?wBh^
new SelectionSort(), ^(%>U!<<%,
new ShellSort(), .[7m4iJf
new QuickSort(), $%/Zm*H
new ImprovedQuickSort(), 1mf_1spB
new MergeSort(), fE >FT9c
new ImprovedMergeSort(), &A>J>b
new HeapSort() -1[ri8t;nV
}; 1cPi>?R:
Z|u_DaSrr|
public static String toString(int algorithm){ |e!Sm{#!
return name[algorithm-1]; r(RJ&\ !
} bR.T94-8y
NoI=t
public static void sort(int[] data, int algorithm) { |yS4um(w
impl[algorithm-1].sort(data); |m~|
} 0@2%pIq\
s`TfNwDvU
public static interface Sort { _:T\[sz5
public void sort(int[] data); :t(}h!7
} 'O CVUF,
U^.$k-|k
public static void swap(int[] data, int i, int j) { Fik*7!XQ8
int temp = data; ;kdJxxUox
data = data[j]; "p<f#s}
data[j] = temp; 3N?uY2
} #+XKfumLk
} f"/NY6