[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; c9@jyq_H?
} ng*E9Puu[
int i1=l; F}DD;K
int i2=mid+1; 4N0nU
for(int cur=l;cur<=r;cur++){ (t['
if(i1==mid+1) e>Y2q|S85
data[cur]=temp[i2++]; W+S; Do
else if(i2>r) lM%fgyX
data[cur]=temp[i1++]; xJGeIh5
else if(temp[i1] data[cur]=temp[i1++]; E-iBA(H
else x7@HPf
data[cur]=temp[i2++]; ?zu{&aOX|
} 28yxX431S
} a$O]'}]`
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} 9iNns;^`q
;O11)u?/s|
改进后的归并排序: u.FDe2|[)
3:#rFb
package org.rut.util.algorithm.support; r2'rfpQ
n"Vd"}sU.
import org.rut.util.algorithm.SortUtil; T$;XJx
p00AcUTq
/** IW_D$pq
* @author treeroot <~+
* @since 2006-2-2 N+75wtLy&
* @version 1.0 &/?jMyD@
*/ h'KtG<+
public class ImprovedMergeSort implements SortUtil.Sort { .U%"oD
rv%[?Ml
private static final int THRESHOLD = 10; }O
l$9,
/* 74(J7
* (non-Javadoc) (*BW/.Fq
* =7,UqMl_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "6QMa,)D
*/ 1U7HS2
public void sort(int[] data) { *)I1gR~
int[] temp=new int[data.length]; @E;pT3; )
mergeSort(data,temp,0,data.length-1); - S-1<xR
} j #YFwX4.
9#6/c
private void mergeSort(int[] data, int[] temp, int l, int r) { #Q7$I.O]
int i, j, k; N Z`hy>LF^
int mid = (l + r) / 2; 6Qu*'
if (l == r) FM[To
return; RY<b]|
if ((mid - l) >= THRESHOLD) vDvGT<d
mergeSort(data, temp, l, mid); ^W'[l al.
else o |iLBh$)
insertSort(data, l, mid - l + 1); ulM&kw.4i
if ((r - mid) > THRESHOLD) ;~1JbP
mergeSort(data, temp, mid + 1, r); w'XgW0j{
else CF_!{X_k}
insertSort(data, mid + 1, r - mid); n#cN[C9
qT @IY)e
for (i = l; i <= mid; i++) { -~fI|A^
temp = data; #+k[[; 0
} yFsXI0I[p
for (j = 1; j <= r - mid; j++) { pnJT]?},
temp[r - j + 1] = data[j + mid]; tvRy8u;
} UV.9KcN.
int a = temp[l]; (=rv `1
int b = temp[r]; UUqj?'Nv
for (i = l, j = r, k = l; k <= r; k++) { nDy=ZsK
if (a < b) { YYW70k:
data[k] = temp[i++]; aM!#
a = temp; G- WJlu
} else { I_7EfAqg(
data[k] = temp[j--]; It-*CD9
b = temp[j]; q2vz#\A?
} He3zV\X[Z
} KL]!E ~i
} 'bPo 5V|
RC%r7K f
/** U$uO%:4%
* @param data d?Cl04
* @param l KW^aARJ)
* @param i a0\UL"z#+
*/ !yrHVc
private void insertSort(int[] data, int start, int len) { 926oM77
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "@$STptkc
} ?UDO%`X
} )A=g# D#
} _<Yo2,1^
} %WR"85
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堆排序： aS G2K0
ts>}>}@vc
package org.rut.util.algorithm.support; ulJYJ+CC!
e]h'
import org.rut.util.algorithm.SortUtil; tb3fz")UC
d.oFlT
/** ^iS:mt
* @author treeroot vW3ZuB
* @since 2006-2-2 wkA!Jv%
* @version 1.0 %QLYNuG
*/ Dj(7'jT
public class HeapSort implements SortUtil.Sort{ Pc==]H(
1s[-2^D+EM
/* (non-Javadoc) 'U$VOq?!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W=]",<
*/ z-gG(
public void sort(int[] data) { ZNeqsN{
MaxHeap h=new MaxHeap(); \;gt&*$-
h.init(data); pUGfm
for(int i=0;i h.remove(); P@`"MNS
System.arraycopy(h.queue,1,data,0,data.length); mkzk$_
} mXj Ljgc}
% 6.jh#C
private static class MaxHeap{ U-<"i6mg?
!5!$h`g
void init(int[] data){ rxeXz<
this.queue=new int[data.length+1]; {][7Np!y
for(int i=0;i queue[++size]=data; -$z"74
fixUp(size); 'PYqp&gJ
} w8I&:"^7<
} ^VPl>jTg
)m;qv'=!
private int size=0; ABmDSV5i
Uy|=A7Ad c
private int[] queue; 7#qL9+G
6FMW g:{
public int get() { F@roQQu
return queue[1]; Nj&%xe>].
} ^|(4j_.(e
<W') ~o}
public void remove() { % ul{nL:
SortUtil.swap(queue,1,size--); %v:h]TA
fixDown(1); K/m)f#
} u@u.N2H.%
file://fixdown )uuEOF"w
private void fixDown(int k) { chzR4"WZFt
int j; D-:<]D:
while ((j = k << 1) <= size) { 0.+eF }'H
if (j < size %26amp;%26amp; queue[j] j++; 5THS5'
if (queue[k]>queue[j]) file://不用交换 B/kn&^z$|~
break; q*TKs#3
SortUtil.swap(queue,j,k); Ab<Ok\e5
k = j; [j U
} lILtxVBO2o
} F>(#Af9
private void fixUp(int k) { BG0Mj2
while (k > 1) { v/.h%6n?
int j = k >> 1; u;qMo`-
if (queue[j]>queue[k]) ~(OIo7#;
break; |hQ|'VCN
SortUtil.swap(queue,j,k); Sb4PCt
k = j; \OT)KVwO
} ^6y4!='ci
} B&kT#
G2{M#H
} RTBBb:eX
;Jn0e:x`E
} slvs oN@
e -]c
SortUtil： &dDI*v+
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package org.rut.util.algorithm; 5=h'!|iY
1$D`Z/N"A
import org.rut.util.algorithm.support.BubbleSort; ;s.5\YZ"k
import org.rut.util.algorithm.support.HeapSort; q}v04Yy,o
import org.rut.util.algorithm.support.ImprovedMergeSort; )-:eQ{st`
import org.rut.util.algorithm.support.ImprovedQuickSort; ]N <]
import org.rut.util.algorithm.support.InsertSort; %g@3S!lK
import org.rut.util.algorithm.support.MergeSort; b_gN?F7_
import org.rut.util.algorithm.support.QuickSort; uPC qO+f
import org.rut.util.algorithm.support.SelectionSort; R:BBNzY}f
import org.rut.util.algorithm.support.ShellSort; PeUd
j*~dFGl)
/** OK?3,<x
* @author treeroot J$9xC{L4
* @since 2006-2-2 AKCfoJ
* @version 1.0 s?x>Yl %
*/ 'BdmFKy1
public class SortUtil { oT (:33$
public final static int INSERT = 1; 0mD;.1:
public final static int BUBBLE = 2; hi D7tb=g~
public final static int SELECTION = 3; m|2]lb
public final static int SHELL = 4; $< K)fbG
public final static int QUICK = 5; hN:F8r+DG
public final static int IMPROVED_QUICK = 6; 5ZyBP~
public final static int MERGE = 7; ENx@Ex
public final static int IMPROVED_MERGE = 8; f,HzrHax
public final static int HEAP = 9; io r [v
fqk Dk
public static void sort(int[] data) { PUjoi@]
sort(data, IMPROVED_QUICK); Ie&b<k
} hp]ng!I{\u
private static String[] name={ +fP/|A8P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'W?v.W &
}; JQ/t, v$G
[[0bhmG)
private static Sort[] impl=new Sort[]{ Q^MXiEO+
new InsertSort(), "^ 6lvZP(
new BubbleSort(), &e]]F#
new SelectionSort(), Ce5w0&VlS
new ShellSort(), hi3sOK*r;<
new QuickSort(), m,gy9$
new ImprovedQuickSort(), H MjeGO.i
new MergeSort(), &Ky u@Tt
new ImprovedMergeSort(), k Kp6
new HeapSort() bxhg*A
}; 2^ ,H_PS
<{NYD.
public static String toString(int algorithm){ h-b5
return name[algorithm-1]; &J^4Y!gt
} ^/DII`A
{NY~JFM
public static void sort(int[] data, int algorithm) { yXTK(<'
impl[algorithm-1].sort(data); -q&7J' N
} "0H56#eW
oWx_O-_._
public static interface Sort { R7B,Q(q2-
public void sort(int[] data); N$,/Q9h^
} ;N$0)2w
&8Jg9#
public static void swap(int[] data, int i, int j) { 9o`7Kc/g
int temp = data; Hw?2XDv j
data = data[j]; };"+ O
data[j] = temp; 'Uko^R)(
} zD)IU_GWa
} 2B9i R