[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; PCV58n3
} 8GF[)z&|P:
int i1=l; rf1wS*uU+
int i2=mid+1; (%ri#r
for(int cur=l;cur<=r;cur++){ r'mnkg2,
if(i1==mid+1) _qO;{%r
data[cur]=temp[i2++]; 1C5kS[!
else if(i2>r) qaCi)f!Dl
data[cur]=temp[i1++]; rR),~ @]sL
else if(temp[i1] data[cur]=temp[i1++]; eR#gG^o8
else (hRgYwUa<
data[cur]=temp[i2++]; 89:?.'
} mVc'%cPaw
} {2'74
j. ks UJ
} +O.&64(
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改进后的归并排序: iOX4Kl
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package org.rut.util.algorithm.support; thlpj*|
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import org.rut.util.algorithm.SortUtil; ~P"!DaAf
B BApL{
/** hy!'Q>[`
* @author treeroot tF;& x g
* @since 2006-2-2 ,oBk>
* @version 1.0 110>p
*/ aPY>fy^8D
public class ImprovedMergeSort implements SortUtil.Sort { 82Z[eo
E,ZB;
private static final int THRESHOLD = 10; Mo/2,DiI5
M<M#<kD
/* A .jp<>
* (non-Javadoc) \gJapx(
* Hb@G*L$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4$q)e<-
*/ e GqvnNv
public void sort(int[] data) { '5OVs:)"^
int[] temp=new int[data.length]; lD;,I^Lt6
mergeSort(data,temp,0,data.length-1); \Z6gXO_
} !S >|Qh
:#Ex3H7
private void mergeSort(int[] data, int[] temp, int l, int r) { yp^[]Mz=
int i, j, k; 2RSHBo
int mid = (l + r) / 2; ga2Q3mV
if (l == r) ()3x%3
return; &"r==A?
if ((mid - l) >= THRESHOLD) j-C42Pfr
mergeSort(data, temp, l, mid); ]`/R("l[
else fn?6%q,!ls
insertSort(data, l, mid - l + 1); CwEWW\Bu
if ((r - mid) > THRESHOLD) |Ad6~E+aL-
mergeSort(data, temp, mid + 1, r); gvRc:5B[
else QU,TAO
insertSort(data, mid + 1, r - mid); &)"7am(S`
nM(=bEX
for (i = l; i <= mid; i++) { Hq"<vp
temp = data; '7O{*=`oj
} v,!Y=8~9
for (j = 1; j <= r - mid; j++) { s:m<(8WRw
temp[r - j + 1] = data[j + mid]; tsSS31cv
} eN2k8=
int a = temp[l]; 5>4A}hSe
int b = temp[r]; 3q.[-.q
for (i = l, j = r, k = l; k <= r; k++) { .olPm3MC
if (a < b) { 1$3XKw'
data[k] = temp[i++]; J.1ln =Y
a = temp; S\{^LVXTMd
} else { ~d#;r5>
data[k] = temp[j--]; Y+"hu2aPkY
b = temp[j]; [ilv/V<
} d6d(?"
} 4-}A'fTU8
} @L>NN>?SGQ
>gOI]*!5
/** 0@mX4.!
* @param data l~Wk07r3
* @param l GHgEbiY:
* @param i Y9co?!J 5M
*/ Y=WN4w
private void insertSort(int[] data, int start, int len) { qY~$wVY(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hO<w]jV,
} meM.?kk(
} (HV~ '5D
} He71h(BHm
} s?Qb{
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堆排序： sWZtbW;)
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package org.rut.util.algorithm.support; T>uWf#&pjs
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import org.rut.util.algorithm.SortUtil; G}?P r4Gj
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/** @#ho(_U8
* @author treeroot EBL,E:_)
* @since 2006-2-2 Z564K7IV
* @version 1.0 Zxxy1Fl#.[
*/ XdIVMXLL\
public class HeapSort implements SortUtil.Sort{ ^s(X VVA
tx1m36a"
/* (non-Javadoc) 5dNf$a0E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7^t(RNq
*/ neY=:9
public void sort(int[] data) { PHiX:0zT
MaxHeap h=new MaxHeap(); cT=wJ
h.init(data); L};;o+5uJD
for(int i=0;i h.remove(); ,w/mk$v
System.arraycopy(h.queue,1,data,0,data.length); nXeK,C
} gq:TUvX
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private static class MaxHeap{ vhquHy.qi#
7Ae,|k
void init(int[] data){ g$-D?~(Z
this.queue=new int[data.length+1]; =*>4Gh i
for(int i=0;i queue[++size]=data; F6GZZKj
fixUp(size); 1PTu3o&3
} ~ GT\RAj[
} qxcBj
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private int size=0; 7pI\`*7b
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private int[] queue; -x%`Wv@L
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public int get() { $I6eHjYT
return queue[1]; io33+/
} GqD!W8+
Lvj5<4h;
public void remove() { m<'xlF
SortUtil.swap(queue,1,size--); AoOG[to7
fixDown(1); 'St= izhd
} `0G.Y
file://fixdown [Fj#7VZK
private void fixDown(int k) { pA,EUh|H
int j; uj1E* 98m
while ((j = k << 1) <= size) { A"3&EuvU
if (j < size %26amp;%26amp; queue[j] j++; \NQ)Po@z
if (queue[k]>queue[j]) file://不用交换 u+gXBU
break; 2"Uk}Yz|
SortUtil.swap(queue,j,k); a&c#* 9t{
k = j; [11-`v0
} A%w]~ chC9
} }:D~yEP
private void fixUp(int k) { Z a1|fB
while (k > 1) { gsR9M%mv
int j = k >> 1; y=qo-v59'
if (queue[j]>queue[k]) UoS;!}l
break; ]XafFr6pe
SortUtil.swap(queue,j,k); 0V,MDX}#_
k = j; HXV73rDA
} Di"9 M(6vf
} +2fJ
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} NlEWm8u
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} w~KBk)!*
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SortUtil： -GWzMBS S
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package org.rut.util.algorithm; = hX-jP
~)8i5p;P/k
import org.rut.util.algorithm.support.BubbleSort; |Ge/|;.v`
import org.rut.util.algorithm.support.HeapSort; tKsM}+fq
import org.rut.util.algorithm.support.ImprovedMergeSort; SF7b1jr
import org.rut.util.algorithm.support.ImprovedQuickSort; g2>u]3&W
import org.rut.util.algorithm.support.InsertSort; nK'8Mo
import org.rut.util.algorithm.support.MergeSort; %+B-Z/1}
import org.rut.util.algorithm.support.QuickSort; r~fl=2>yQ
import org.rut.util.algorithm.support.SelectionSort; 9}0Jc(B/x
import org.rut.util.algorithm.support.ShellSort; =yhfL2`aw
]9< 9F ?
/** UpseU8Wo
* @author treeroot @#Uiy5N
* @since 2006-2-2 I_I;.Ik
* @version 1.0 WCl;#=
*/ o4'4Hy
public class SortUtil { aq\TO?
public final static int INSERT = 1; @wgGnb)
public final static int BUBBLE = 2; `b`52b\6S
public final static int SELECTION = 3; c%/&@vs7
public final static int SHELL = 4; UVmyOC[Y{
public final static int QUICK = 5; d?y\~<
public final static int IMPROVED_QUICK = 6; `"mK\M
public final static int MERGE = 7; %c/"A8{eb
public final static int IMPROVED_MERGE = 8; :O+b4R+
public final static int HEAP = 9; rkc%S5we
=}GyI_br;8
public static void sort(int[] data) { H1qw1[%0y
sort(data, IMPROVED_QUICK); I5OH=,y`
} &`Z)5Ww
private static String[] name={ 8PjhvU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Wy>\KrA1
}; E/P53CD
r_sl~^* :
private static Sort[] impl=new Sort[]{ PjZvLK@a9)
new InsertSort(), J*&=J6
new BubbleSort(), /~huTKA}
new SelectionSort(), LF.~rmPa
new ShellSort(), \bA'Furp
new QuickSort(), d]~1.i
new ImprovedQuickSort(), $<e .]`R
new MergeSort(), %vYlu%c<
new ImprovedMergeSort(), Eq;frnw>q
new HeapSort() )mVYqlU"
}; >t2)Z|1
rWpfAE)!
public static String toString(int algorithm){ f_2^PF>?
return name[algorithm-1]; 5nqdY*
} PlRs-%d
58'y~Ou
public static void sort(int[] data, int algorithm) { H>X1(sh#}
impl[algorithm-1].sort(data); 7tKft
} sZBO_](S
uN0fWj]
public static interface Sort { VgoKi
public void sort(int[] data); "hY^[@7 W
} [m[~A|S
Dx*oSP.qX
public static void swap(int[] data, int i, int j) { GJfNO-
int temp = data; 'c(Y")QP
data = data[j]; slO9H6<
data[j] = temp; '^3pF2lIw
} ibUPd."W
} v$/i5kcWx