[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; {Yj5Mj|#
} a{]=BY oL
int i1=l; &:&89<C'
int i2=mid+1; 8}B
for(int cur=l;cur<=r;cur++){ Y<xqws
if(i1==mid+1) zeHF-_{
data[cur]=temp[i2++]; <kK>C8+
else if(i2>r) xol%\$|
data[cur]=temp[i1++]; +.V+@!
else if(temp[i1] data[cur]=temp[i1++]; fg^25g'_
else gJ6`Kl985O
data[cur]=temp[i2++]; o&?c,FwN
} 1INX#qTZ
} #d-({blo<
qVn<c,8#
} )7>GXZG>=
7ftn gBv?
改进后的归并排序: !=dz^f.{
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package org.rut.util.algorithm.support; {@InOo!4w]
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import org.rut.util.algorithm.SortUtil; Ei4^__g\'
XN df
/** BsQ;`2
* @author treeroot NIV}hf YF
* @since 2006-2-2 d51lTGH7Z
* @version 1.0 w]wZJ/U`
*/ g&$=Y7G
public class ImprovedMergeSort implements SortUtil.Sort { 0JlNUO5Nt
Q|(}rIWOQA
private static final int THRESHOLD = 10; ],]Rv#`
WX&IQ@
/* V:n0BlZ,B
* (non-Javadoc) ?@b6(f xX
* ?:;;0kSk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C >*z^6Gz
*/ Vq'7gJj'
public void sort(int[] data) { ?v2_7x&
int[] temp=new int[data.length]; gu k,GF9p]
mergeSort(data,temp,0,data.length-1); 7Nq< o5
} FOiwA.:0
sVFO&|L
private void mergeSort(int[] data, int[] temp, int l, int r) { o*KAS@&
int i, j, k; CD`a-]6qA
int mid = (l + r) / 2; j 3<Ci {3
if (l == r) J6Ilg@}\
return; N^;lp<{6?
if ((mid - l) >= THRESHOLD) Ng#psN
mergeSort(data, temp, l, mid); tia}&9;
else B{Cm`f8E
insertSort(data, l, mid - l + 1); "hyfo,r
if ((r - mid) > THRESHOLD) AwJg/VBo)
mergeSort(data, temp, mid + 1, r); )M8d\]
else B7\4^6Tx
insertSort(data, mid + 1, r - mid); .eJKIck
3qWrSziD
for (i = l; i <= mid; i++) { JU8}TX
temp = data; ~>:JwTy
} rc=E%Qv%?
for (j = 1; j <= r - mid; j++) { }9@rhW
temp[r - j + 1] = data[j + mid]; zdP?HJ=F
} ().C
int a = temp[l]; 8{4'G$6
int b = temp[r]; uz3cho'
for (i = l, j = r, k = l; k <= r; k++) { @fd<
if (a < b) { }u^bTR?3
data[k] = temp[i++]; BbB3#/g
a = temp; |r@;ulO
} else { 2f(`HSC'
data[k] = temp[j--]; qZ<n\Mt
b = temp[j]; e{8C0=
} ]D6<6OB
} -l=C7e
} /qQx~doK
lg|6~=aQ
/** )QAYjW!Z
* @param data )=)N9CRy
* @param l DS8HSSD
* @param i {A}T^q!m]
*/ >D=X Tgqqq
private void insertSort(int[] data, int start, int len) { C5=^cH8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #7fOH U8v
} eGMw:H
} `_ ^I 2
} >(:3H+
} ?3DL .U{
fTmJDUv+
堆排序： H8HH) ^
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package org.rut.util.algorithm.support; 2-S}#S}2C
wgSFL6Ei
import org.rut.util.algorithm.SortUtil; OBFM70K
Q*1Avy6]
/** K%9!1'
* @author treeroot drCL7.j#L
* @since 2006-2-2 8Ogg(uS70'
* @version 1.0 dhLd2WSyH
*/ V xN!Ki=
public class HeapSort implements SortUtil.Sort{ Ps! \k%FUl
`DSDuJw%
/* (non-Javadoc) D[T\_3W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +)9=bB
*/ J;fbE8x
public void sort(int[] data) { oKRI2ni$j9
MaxHeap h=new MaxHeap(); p7},ymQ|YQ
h.init(data); o<|u4r={s
for(int i=0;i h.remove(); :4:U\k;QwA
System.arraycopy(h.queue,1,data,0,data.length); :CM2kh"Iu
} ,*$Y[UT
wKW.sZ!S1
private static class MaxHeap{ pJ?y
z'Bvjul
void init(int[] data){ "97sH_ ,
this.queue=new int[data.length+1]; +MS*YpPW
for(int i=0;i queue[++size]=data; }m!T~XR</
fixUp(size); !ggHLZRlz
} 7x*L 1>[`'
} JWt@vf~
m=`V
private int size=0; G$`hPNSh
q:_-#u
private int[] queue; CyS.GdyP
d.snD)X
public int get() { RZvRV?<bR
return queue[1]; `=TJw,q
} ~@^pX*%i
*@ \LS!N
public void remove() { WAr6Dv,8
SortUtil.swap(queue,1,size--); kDKfJp&a
fixDown(1); 5N>L|J2
} 6.v)q,JL
file://fixdown P\X$fD
private void fixDown(int k) { N[=R$1\Z
int j; O sIvW'$\
while ((j = k << 1) <= size) { R*"zLJP
if (j < size %26amp;%26amp; queue[j] j++; #1>c)_H
if (queue[k]>queue[j]) file://不用交换 cTJG1'm
break; 6K.0dhl>`B
SortUtil.swap(queue,j,k); L{1PCs36c
k = j; e=6C0fr
} 9&4z4@on
} cj3P]2B#
private void fixUp(int k) { w##$SaTI
while (k > 1) { CwzDkr&QC_
int j = k >> 1; l;JB;0<s"
if (queue[j]>queue[k]) _`]YWvh
break; k5Df97\s
SortUtil.swap(queue,j,k); gDsb~>rb|
k = j; ;x=0+0JD
} ]+78 "(
} >x1?t
Xpf:I
} 9&KiG* .
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} )mXu{uowr
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SortUtil： %wux#"8
=qTmFszT
package org.rut.util.algorithm; Z:%~Al:
/4-6V d"8
import org.rut.util.algorithm.support.BubbleSort; !.5,RIf
import org.rut.util.algorithm.support.HeapSort; r`CsR0[
import org.rut.util.algorithm.support.ImprovedMergeSort; _"c?[n
import org.rut.util.algorithm.support.ImprovedQuickSort; ^b`aO$
import org.rut.util.algorithm.support.InsertSort; 1lQO`CmR6M
import org.rut.util.algorithm.support.MergeSort; B"I^hrQ
import org.rut.util.algorithm.support.QuickSort; ?,x3*'-(
import org.rut.util.algorithm.support.SelectionSort; _0e;&2')
import org.rut.util.algorithm.support.ShellSort; 5XA{<)$
3,-xk!W$L
/** [E|%
* @author treeroot Bgj^n{9x
* @since 2006-2-2 'e06QMp@
* @version 1.0 -|A`+1-R+
*/ 3rw<#t;v
public class SortUtil { 4XXuj
public final static int INSERT = 1; hE>%LcP
public final static int BUBBLE = 2; Z |CL:)h
public final static int SELECTION = 3; #Rcb iV*M
public final static int SHELL = 4; g O ;oM?|
public final static int QUICK = 5; P+nd?:cz
public final static int IMPROVED_QUICK = 6; jUCrj'
public final static int MERGE = 7; u3ns-e
public final static int IMPROVED_MERGE = 8; 5WvtvSO
public final static int HEAP = 9; `8D}\w<eI
;4ETqi9
public static void sort(int[] data) { },LO]N|
sort(data, IMPROVED_QUICK); 9s'[p'[Z
} hMvLx>q3)
private static String[] name={ 1iTI8h&[@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R-V4Ju[:
}; 9( "<NB0y
j!<(`
private static Sort[] impl=new Sort[]{ Gm2q`ki
new InsertSort(), =9AX\2w*H;
new BubbleSort(), 8\{1y:|
new SelectionSort(), sw^4h`^'
new ShellSort(), qlgo#[i
new QuickSort(), I@/+=
new ImprovedQuickSort(), :7[20n}w
new MergeSort(), 6./3w&D;
new ImprovedMergeSort(), \hr2#!
new HeapSort() H%z9VJ*!0
}; M4`.[P4
LW '3m5
public static String toString(int algorithm){ nWz7$O
return name[algorithm-1]; gJC~$/2
} %!r@l7<
;*}tbh3;.
public static void sort(int[] data, int algorithm) { :[C"}mR1
impl[algorithm-1].sort(data); dFVx*{6
} ?|NMJQsa7
O~ ]3.b
public static interface Sort { f\U(7)2
public void sort(int[] data); o/~Rf1
} Q^!x8oUF
eN{ewn#0.
public static void swap(int[] data, int i, int j) { lzDA0MPI:
int temp = data; )~[rb<:)b
data = data[j]; mx3p/p
data[j] = temp; ZD;1{
} x@*!MC#
} ?)V?6"fFP