[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; 5|/vc*m_0'
} m1cyCD
int i1=l; nQgn^z#
int i2=mid+1; 7z$+ *]9-
for(int cur=l;cur<=r;cur++){ v:+se6HY?p
if(i1==mid+1) 4SOj>(a#
data[cur]=temp[i2++]; D?E5p.!A
else if(i2>r) ZqhINM*Rm
data[cur]=temp[i1++]; Xu T|vh
else if(temp[i1] data[cur]=temp[i1++]; ="4jk=on
else G%P]qi
data[cur]=temp[i2++]; 'dg OE
} C/cyqxVl}
} "3v%|
d,>l;l
} /q^( uWu
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改进后的归并排序: 9DT}sCLz:B
Z]6D0b
package org.rut.util.algorithm.support; oDRNM^gz
}`eeItI+
import org.rut.util.algorithm.SortUtil; 1|`9Hp6
&Y,Rm78
/** Z# :Ww
* @author treeroot 1-,l|K
* @since 2006-2-2 )Y:CV,`
* @version 1.0 f"-?%I*'
*/ )oNomsn
public class ImprovedMergeSort implements SortUtil.Sort { &oR&NKk
'J\%JAR@
private static final int THRESHOLD = 10; yZ2,AR%
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/* 4f1*?HX&
* (non-Javadoc) !nd*U}q
* 2{%BQq>C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3sL#_@+yz
*/ ~vt8|OOo0
public void sort(int[] data) { h?SUDk:2^
int[] temp=new int[data.length]; [m4<j
mergeSort(data,temp,0,data.length-1); ':fVb3A[*d
} 4f>Vg$4
qzH97<M}T
private void mergeSort(int[] data, int[] temp, int l, int r) { R{WG>c
int i, j, k; t &ucqY
int mid = (l + r) / 2; T|=8jt,
if (l == r) E;X'.7[c
return; 's9)\LS>p
if ((mid - l) >= THRESHOLD) sPhh#VCw{
mergeSort(data, temp, l, mid); +F@9AO>LF
else $DQMN
insertSort(data, l, mid - l + 1); g6~uf4;
if ((r - mid) > THRESHOLD) c~Ha68
mergeSort(data, temp, mid + 1, r); Vw,dHIe(3
else *AJW8tIP
insertSort(data, mid + 1, r - mid); Kg%_e9nj#
tV T(!&(
for (i = l; i <= mid; i++) { _ '}UNIL
temp = data; ~+1t17
} J4JKAv~3
for (j = 1; j <= r - mid; j++) { Y`_6Ny="
temp[r - j + 1] = data[j + mid]; p3-sEIw}Ru
} :JOF!Q
int a = temp[l]; wvgX5P>
int b = temp[r]; $}jSIn=~|t
for (i = l, j = r, k = l; k <= r; k++) { 6g!t1%Kb
if (a < b) { #]Cr zLe
data[k] = temp[i++]; ^v`|0z\
a = temp; +`9T?:fu
} else { Bkcs4 x
data[k] = temp[j--]; 8 /\rmf\
b = temp[j]; T+gqu &9R
} *%MY. #
} GB{%4)%6
} :_vf1>[
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/** [WB8X,
* @param data \Q &Kd|
* @param l Q2+e`
* @param i ,H|V\\
*/ Iz ,C!c
private void insertSort(int[] data, int start, int len) { \oaO7w,:"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yDHH05Yl
} }3QEclZr
} yYW>)
} w 5,-+&;
} U/TF,JUI
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堆排序： C`DTPoXN
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package org.rut.util.algorithm.support; 9]|cs
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import org.rut.util.algorithm.SortUtil; <Nkj)`%5iK
T[c;},
/** zEa3a
* @author treeroot p-;*K(#X
* @since 2006-2-2 ] @IzJz"R
* @version 1.0 \[Q,>{^
*/ RU@`+6j+
public class HeapSort implements SortUtil.Sort{ pvcD 61,
\`x$@s?
/* (non-Javadoc) qi$6y?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yQh":"$k
*/ VJm).>E3k
public void sort(int[] data) { g#:?Ay-m
MaxHeap h=new MaxHeap(); ':J[KWuV
h.init(data); [X;yJ$
for(int i=0;i h.remove(); cE[4CCpy
System.arraycopy(h.queue,1,data,0,data.length); 3>-^/
} }]/"auk
n)[{nkS6[
private static class MaxHeap{ )f,iey\-
yv&&x.!.Z
void init(int[] data){ Fd0R?d
this.queue=new int[data.length+1]; !hEtUF
for(int i=0;i queue[++size]=data; l+RBe<Mq
fixUp(size); (rvK@
} 1_f(;WOg
} >12phLu
l&[x)W
private int size=0; eR=P
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private int[] queue; L%Me wU0TZ
\&"gCv#
public int get() { U+URj <)
return queue[1]; fgq#Oi}
} &h')snp:#
>q"mI6F
public void remove() { RlC|xj"l%
SortUtil.swap(queue,1,size--); O*X]oX
fixDown(1); A-qdTJP
} pm@Mlwg`1
file://fixdown 3N[t2Y1r
private void fixDown(int k) { HW)> `
int j; pFx7URZA
while ((j = k << 1) <= size) { [a`89'"z
if (j < size %26amp;%26amp; queue[j] j++; >6KuZ_
if (queue[k]>queue[j]) file://不用交换 7"FsW3an
break; bU7n1pzW,o
SortUtil.swap(queue,j,k); :!n_a*.{
k = j; I ze+](
} ]-&A)M6
} V+(1U|@~
private void fixUp(int k) { !0i
while (k > 1) { jEo)#j];`<
int j = k >> 1; uD}Q}]Z
if (queue[j]>queue[k]) !g'kWE[
break; a~>+I~^K5q
SortUtil.swap(queue,j,k); 9'Le}`Gf
k = j; N8#wQ*MM>
} -c{O!z6sX
} 'S;INs2|->
&gR)Y3
} eVGO6 2|!
B<%cqz@
} u$O` \=
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SortUtil： 5_!s\5
*j6KQZ"
package org.rut.util.algorithm; clV3x`z
db -h=L|
import org.rut.util.algorithm.support.BubbleSort; C0(?f[/(M
import org.rut.util.algorithm.support.HeapSort; OX-t#R`
import org.rut.util.algorithm.support.ImprovedMergeSort; P{-j^'y
import org.rut.util.algorithm.support.ImprovedQuickSort; G)t_;iNL|
import org.rut.util.algorithm.support.InsertSort; o<cg9
import org.rut.util.algorithm.support.MergeSort; 1DLAfsLlj
import org.rut.util.algorithm.support.QuickSort; 6V-u<FJ
import org.rut.util.algorithm.support.SelectionSort; E^qJ5pr_P
import org.rut.util.algorithm.support.ShellSort; y(^t&tgjS
KPHtD4
/** T+1:[bqK
* @author treeroot tpPP5C{
* @since 2006-2-2 X$BN&DD
* @version 1.0 A{NKHn>%`
*/ Sqn|
public class SortUtil { ,Pi!%an w
public final static int INSERT = 1; sE:~+C6o:
public final static int BUBBLE = 2; VW&EdrR,S
public final static int SELECTION = 3; EdcbWf7
public final static int SHELL = 4; aG_@--=
public final static int QUICK = 5; Bm"-X:='
public final static int IMPROVED_QUICK = 6; ,=>Ws:j
public final static int MERGE = 7; +{#65z
public final static int IMPROVED_MERGE = 8; /]pJ(FFC
public final static int HEAP = 9; w2X0.2)P2
/{Mo'.=Z
public static void sort(int[] data) { 03pD<
sort(data, IMPROVED_QUICK); <fSWX>pR
} aW=c.Q.
private static String[] name={ @I"&k!e<2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0{Uc/
}; Eqizx~eqq
m#K)%0
private static Sort[] impl=new Sort[]{ }Wlm#t
new InsertSort(), Lh@0|k
new BubbleSort(), c~``)N
new SelectionSort(), f4 k
new ShellSort(), e'I/}J
new QuickSort(), (/gv U80
new ImprovedQuickSort(), cV$an
new MergeSort(), a_Sp}s<J
new ImprovedMergeSort(), FP=up#zl
new HeapSort() ,ArHS
}; qPQ6`rD\
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public static String toString(int algorithm){ %cO^:
return name[algorithm-1]; 7F5v-/
} f`<elWgc"
2x5^kN7
public static void sort(int[] data, int algorithm) { ,Iv eKk5W
impl[algorithm-1].sort(data); ~k"r
} ^yLhL^Y
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public static interface Sort { dvAG}<
public void sort(int[] data); 22OfbwCb
} q\pI&B
vmzc0J+3p
public static void swap(int[] data, int i, int j) { #Z. QMWq
int temp = data; o;TS69|D
data = data[j]; VQ"Z3L3-4
data[j] = temp; !n7'TM'
} CZ33|w
} Kpg?' !I