[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; NRDXWscb
} )5/,B-+O"
int i1=l; ECr}7R%
int i2=mid+1; }C<$q
for(int cur=l;cur<=r;cur++){ u/(~ewI
if(i1==mid+1) #B!<gA$/
data[cur]=temp[i2++]; 1Y(NxC0P=g
else if(i2>r) F$te5 `a
data[cur]=temp[i1++]; ]Wx?k7T
else if(temp[i1] data[cur]=temp[i1++]; Ktn:6=,
else o&:'MwU
data[cur]=temp[i2++]; U~q2j#pJ
} 87yZd8+)
} VhLS*YiSY
Fb\ E39
} hK 1 H'~c
S$NJmXhx5
改进后的归并排序: x|GkXD3
uG=~kO
package org.rut.util.algorithm.support; 7&3
-SUK[<=X
import org.rut.util.algorithm.SortUtil; a9g~(#?a
yz^4TqJ
/** \IO<V9^L
* @author treeroot @|EWif|
* @since 2006-2-2 ?(Ytc)
* @version 1.0 ky@ZEp=
*/ BI+x6S>d
public class ImprovedMergeSort implements SortUtil.Sort { <7_s'UAL!
_@OS,A
private static final int THRESHOLD = 10; UT_kw}1o
<HH\VG\H6
/* o^v]d7I8b
* (non-Javadoc) iaHL&)[YK
* uP$C2glyz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l4*vM
*/ O'h f8w
public void sort(int[] data) { ;$'D13
int[] temp=new int[data.length]; D-LQQ{!D5
mergeSort(data,temp,0,data.length-1); }h1y^fuGi
} VWrb`p@
%\T#Ik~3
private void mergeSort(int[] data, int[] temp, int l, int r) { L [&|<<c
int i, j, k; Egmp8:nZl@
int mid = (l + r) / 2; _o? I=UN2:
if (l == r) DO6 pv
return; = ( 4l
if ((mid - l) >= THRESHOLD) M}]4tAyT
mergeSort(data, temp, l, mid); lf#5X)V
else uc aa;zj
insertSort(data, l, mid - l + 1); W:hTRq
if ((r - mid) > THRESHOLD) >?[?W|k7V
mergeSort(data, temp, mid + 1, r); q\xsXM
else 2=7:6Fw
insertSort(data, mid + 1, r - mid); y+h/jEbM</
}kSP p
for (i = l; i <= mid; i++) { XZT|ID_u"
temp = data; RQU-]qQ8BM
} o)+C4f[G4
for (j = 1; j <= r - mid; j++) { AjJ/t4<
temp[r - j + 1] = data[j + mid]; 'EC0|IT)c
} IV~5Y{(l
int a = temp[l]; kQ"Ax? b
int b = temp[r]; eOahr:Db
for (i = l, j = r, k = l; k <= r; k++) { <Ok7-:OxA
if (a < b) { +wfZFJ:1l
data[k] = temp[i++]; m -0}Pe9L
a = temp; F`>qg2wO
} else { R)-~5"}~
data[k] = temp[j--]; SgkW-#
b = temp[j]; [8>#b_>
} EAHdt=8W{
} MzF,is
} lQxEiDIL
? M.'YB2
/** lo-VfKvy
* @param data xeKm} MN]S
* @param l Y.kc,~vYL
* @param i E85TCS1
*/ SNf~%B?`L
private void insertSort(int[] data, int start, int len) { (dh9aR_a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2fXwJG'
} 5sSAH
} U+aiH U9
} n`!6EaD
} _+Z5qUmQ
z\YLO%Mm
堆排序： ^CD?SP"i
nELY(z
package org.rut.util.algorithm.support; X9?0`6Li
)1 QOA
import org.rut.util.algorithm.SortUtil; 93=?^
,;Uf>8~
/** GC_c.|'6[
* @author treeroot ?)Je%H
* @since 2006-2-2 TP/bX&bjCy
* @version 1.0 M"-.D;sa1
*/ |io)?`pj
public class HeapSort implements SortUtil.Sort{ ?Ss~!38
_C19eW'
/* (non-Javadoc) 40z1Qkmaey
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'T7Y5X80$j
*/ TD78&a#
public void sort(int[] data) { S,Q(,e^&
MaxHeap h=new MaxHeap(); `i+2YCk
h.init(data); u|k_OUTq
for(int i=0;i h.remove(); i 1Kq(7
System.arraycopy(h.queue,1,data,0,data.length); ?}= $zN
} f8G<5_!K_
.v-2A);I
private static class MaxHeap{ sHPj_d#
BB_(!omq[
void init(int[] data){ fPstSez
this.queue=new int[data.length+1]; ?{xD{f$
for(int i=0;i queue[++size]=data; 3{$>-d
fixUp(size); G[u{! 2RS
} N8=-=]0G
} lkC|g%f
IkxoW:L
private int size=0; o/[Ks;l
IRTWmT jT
private int[] queue; "-j96 KD
BuUM~k&SY
public int get() { vsQvJDna~
return queue[1]; }*O8]lG
} Z`|\%D%
^(@]5$^Z
public void remove() { lHHx D
SortUtil.swap(queue,1,size--); e)}=T0 s
fixDown(1); LabI5+g
} Zq H-]?)
file://fixdown <I0om(P
private void fixDown(int k) { bH:C/P<x
int j; Vr;>Im
while ((j = k << 1) <= size) { +_QcLuV,
if (j < size %26amp;%26amp; queue[j] j++; *P&lAyt6
if (queue[k]>queue[j]) file://不用交换 8i<]$
break; sGpAaGY>
SortUtil.swap(queue,j,k); S,f#g?V
k = j; 4Lz[bI
} } :gi<#-:G
} Xg\unUHa
private void fixUp(int k) { K@:Ab'(P^|
while (k > 1) { NzN"_ojM
int j = k >> 1; (]10Z8"fJ
if (queue[j]>queue[k]) 6E(..fo:"
break; %*Vr}@BA)
SortUtil.swap(queue,j,k); IGab~`c-[
k = j; y(E<MRd8V
} L"0?g(< 5
} D 5:'2i
jE8}Ho_#)
} c `.BN(
6\.LG4@LO
} G]mD_J1$
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SortUtil： \((5Sd
ZF8`=D`:R
package org.rut.util.algorithm; Dd-a*6|x
NgF"1E
import org.rut.util.algorithm.support.BubbleSort; &5[+p{2
import org.rut.util.algorithm.support.HeapSort; &5G@YQD1e
import org.rut.util.algorithm.support.ImprovedMergeSort; 6z:/ma^
import org.rut.util.algorithm.support.ImprovedQuickSort; .RyuWh!5
import org.rut.util.algorithm.support.InsertSort; yL -}E
import org.rut.util.algorithm.support.MergeSort; qG9j}[d'
import org.rut.util.algorithm.support.QuickSort; ;>F1?5P{
import org.rut.util.algorithm.support.SelectionSort; bf2r8
import org.rut.util.algorithm.support.ShellSort; ;E>#qYC6
{>XoE %
/** EB6X Yr
* @author treeroot ,)aUp4*
* @since 2006-2-2 *O\lR-z!k
* @version 1.0 |ZXz&Xor
*/ m`]d`%Ex
public class SortUtil { 2^w{Hcf
public final static int INSERT = 1; ,mC=MpfzJ
public final static int BUBBLE = 2; YD{N)v
public final static int SELECTION = 3; @D `j
public final static int SHELL = 4; kg,\l9AM
public final static int QUICK = 5; _+~&t9A!
public final static int IMPROVED_QUICK = 6; <s$T7Zk
public final static int MERGE = 7; \w(0k^<7
public final static int IMPROVED_MERGE = 8; /Ei e5p
public final static int HEAP = 9; 2v#gCou
Q&"oh
public static void sort(int[] data) { (hIo0.
sort(data, IMPROVED_QUICK); %Z,n3iND
} s#")hMJQ
private static String[] name={ aygK$.wos
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'op_GW
}; dO,;k+
:Gx5vo
private static Sort[] impl=new Sort[]{ 475g-t2"@
new InsertSort(), |YfJ#Agm+
new BubbleSort(), i XGy*#>V
new SelectionSort(), Gi2Fjq/Y
new ShellSort(), [nrD4
new QuickSort(), jpTk@
new ImprovedQuickSort(), dy'lM ;@-
new MergeSort(), !;hp
new ImprovedMergeSort(), D]|{xKC}
new HeapSort() D";clP05K
}; )@y7 qb
O'3/21)|y
public static String toString(int algorithm){ cR*~JwC:
return name[algorithm-1]; GMoz$c6n_
} B7.&yXWgn
=En1?3?
public static void sort(int[] data, int algorithm) { 9-24c
impl[algorithm-1].sort(data); P_75-0G
} 3*(><<ZC
lQm7`+
public static interface Sort { 'm-5
public void sort(int[] data); /g!Xe]Ss
} xh!T,|IR
[qkc6sqo
public static void swap(int[] data, int i, int j) { && PZ;
int temp = data; L 7LUy$M-<
data = data[j]; kX:1=+{xg
data[j] = temp; 1&9w]\Ae7l
} =ReSlt
} l7IF9b$c