[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; c k$ > yk
} Px!M^ T!Pi
int i1=l; kl0!*j
int i2=mid+1; ;3nR_6\
for(int cur=l;cur<=r;cur++){ q'07
if(i1==mid+1) dSD7(s!
data[cur]=temp[i2++]; :YZqrcr}
else if(i2>r) j^t#>tZS
data[cur]=temp[i1++]; Mw0Kg9M
else if(temp[i1] data[cur]=temp[i1++]; z,6X{=
else x=UwyZ
data[cur]=temp[i2++]; uafSz@`
} ?0v(_ v
} `)9nBZ
L(p{>Ykcc
} H`js1b1n
d"E@e21
改进后的归并排序: 6;LM1 _
@~4Q\^;NX
package org.rut.util.algorithm.support; e?Pzhha
5 A/[x$q
import org.rut.util.algorithm.SortUtil; Fk:yj 4'
%gF; A*
/** !>~W5c^
* @author treeroot !+&Rn\e%7
* @since 2006-2-2 b(hnouS
* @version 1.0 WUVRwJ 5
*/ [d(@lbV0
public class ImprovedMergeSort implements SortUtil.Sort { ZyJdz+L{@V
IZ<d~ [y
private static final int THRESHOLD = 10; 9t 3mU:
7^{M:kYC!
/* $6W o$c%
* (non-Javadoc) Ueq*R(9>
* 6ty>0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jj<UtD+
*/ oKl^Ttr
public void sort(int[] data) { TRQ@=.
int[] temp=new int[data.length]; MwoU>+XB
mergeSort(data,temp,0,data.length-1); QB<9Be@e
} 3GH@|id
9#:b+Amzz
private void mergeSort(int[] data, int[] temp, int l, int r) { !xU1[,9
int i, j, k; ]et4B+=i
int mid = (l + r) / 2; N;<.::x
if (l == r) d?j_L`?+
return; ~0mO<0~
if ((mid - l) >= THRESHOLD) )c'5M]V
mergeSort(data, temp, l, mid); Ca: jN0
else x%acWeV5
insertSort(data, l, mid - l + 1); *Q?ZJS~
if ((r - mid) > THRESHOLD) fl{wF@C6
mergeSort(data, temp, mid + 1, r); orGNza"A
else ?tWcx;h:>
insertSort(data, mid + 1, r - mid); <A"T_Rk
7Z-'@m
for (i = l; i <= mid; i++) { ?o@5PL
temp = data; E*[dc
} 8PQn=k9
for (j = 1; j <= r - mid; j++) { jv:!vi:
temp[r - j + 1] = data[j + mid]; |N9::),<
} )!h(oR
int a = temp[l]; `rt
int b = temp[r]; |5uvmK
for (i = l, j = r, k = l; k <= r; k++) { ;Z\1PwT
if (a < b) { jOJ$QT
data[k] = temp[i++]; E7A psi4]
a = temp; d(.e%[`
} else { Y{6vW-z_<
data[k] = temp[j--]; _l?InNv
b = temp[j]; (!-gX"<b
} -E6#G[JJ
} (1~d/u?2\
} 7 Jxhn!
sV8}Gv a
/** H4s^&--
* @param data =0te.io)3O
* @param l K[tQ>C@s2
* @param i W|IMnK-
*/ %LeQpbyOR
private void insertSort(int[] data, int start, int len) { {K\l3_=5qb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QEKRAPw
} `Yk~2t"V
} #cB=](N
} VO_! +
} !.(Kpcrg
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堆排序： axJuJ`+Y
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package org.rut.util.algorithm.support; mWOW39Ku
9FB[`}
import org.rut.util.algorithm.SortUtil; 6jv_j[[
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/** en"]u,!
* @author treeroot 6#Ag^A
* @since 2006-2-2 (@t O1g
* @version 1.0 "/ N ?$
*/ Dj Z;LE>
public class HeapSort implements SortUtil.Sort{ YCv)DW;
6OBe^/ZRt
/* (non-Javadoc) d~i WV6Va
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?gknJ:
*/ ?xftr(
public void sort(int[] data) { EV1x"}D A_
MaxHeap h=new MaxHeap(); -^ )0c
h.init(data); y v6V1gK
for(int i=0;i h.remove(); ws"{Y+L
System.arraycopy(h.queue,1,data,0,data.length); ~}uv4;0l]
} D?+\"lI
~SI`%^L
private static class MaxHeap{ !VaKq_W
'q158x
void init(int[] data){ $;kFuJF
this.queue=new int[data.length+1]; fkLI$Cl
for(int i=0;i queue[++size]=data; qOA+ao
fixUp(size); K U 2LJ_~Y
} )?5027^
} D{-h2=V
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private int size=0; ;yfKYN[
;kSRv=S
private int[] queue; U3Fa.bC6}
vrRbUwL!
public int get() { ZXCq>
return queue[1]; }tq
} #xUX1(
``;.Oy6jS
public void remove() { ChvSUaCS
SortUtil.swap(queue,1,size--); Ban@$uf
fixDown(1); yyp0GV.x
} [v@3|@
file://fixdown SM57bN
private void fixDown(int k) { }ufzlHD
int j; W<f-
while ((j = k << 1) <= size) { gN,O)@N'd3
if (j < size %26amp;%26amp; queue[j] j++; &cZQ,o
if (queue[k]>queue[j]) file://不用交换 ,;3bPjey
break; Ck:RlF[6C
SortUtil.swap(queue,j,k); 2TFb!?/RQ
k = j; #&V7CYJ
} '}4z=f`}
} mS\gh)<h
private void fixUp(int k) { LtIR)EtB]
while (k > 1) { #Hn<4g"AjM
int j = k >> 1; <WXGDCj
if (queue[j]>queue[k]) NCW<~
break; 3,ihVVr&P
SortUtil.swap(queue,j,k); TLcev*
k = j; #'DrgZ)W
} a0wSXd
} (p19"p
;(&$Iw9X
} X8}m %
WqX$;'}h
} *~h@KQm7
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SortUtil： M =/+q
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package org.rut.util.algorithm; ,/fB~On-
FUt{-H!<
import org.rut.util.algorithm.support.BubbleSort; \d'>Ky;GD
import org.rut.util.algorithm.support.HeapSort; x;^DlyyYU
import org.rut.util.algorithm.support.ImprovedMergeSort; Y ~TR`y
import org.rut.util.algorithm.support.ImprovedQuickSort; `w&A;fR!H
import org.rut.util.algorithm.support.InsertSort; <{ER#}b:O
import org.rut.util.algorithm.support.MergeSort; lEZODc+%Y
import org.rut.util.algorithm.support.QuickSort; 6TR` O
import org.rut.util.algorithm.support.SelectionSort; v3p0
import org.rut.util.algorithm.support.ShellSort; *F<Ar\f5
AvmI<U
/** 'hoEdJ]t5
* @author treeroot Abw=x4d(i
* @since 2006-2-2 V4#bW
* @version 1.0 aru;yR
*/ N8[ &1
public class SortUtil { -dto46X
public final static int INSERT = 1; *VUD!`F
public final static int BUBBLE = 2; H=/;
public final static int SELECTION = 3; Sg&0a$
public final static int SHELL = 4; lU\v8!Ji
public final static int QUICK = 5; vpg*J/1[
public final static int IMPROVED_QUICK = 6; lXT+OJF
public final static int MERGE = 7; >z'T"R/
public final static int IMPROVED_MERGE = 8; [QwBSq8)
public final static int HEAP = 9; gLDO|ADni
^P!(*k#T
public static void sort(int[] data) { JT,[;
sort(data, IMPROVED_QUICK); ngt?9i;N
} '?Jz8iu-
private static String[] name={ Z|#G+$"QV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" htuYctu`
}; euMJ c
#Dz. 58A
private static Sort[] impl=new Sort[]{ 4)Bk:K
new InsertSort(), ^g'P H{68
new BubbleSort(), 5i0vli/L
new SelectionSort(), ]/#3 P
new ShellSort(), yI{4h $c
new QuickSort(), XLgp.w;
new ImprovedQuickSort(), N,3 )`Vm
new MergeSort(), DqJzsk'd3
new ImprovedMergeSort(), "C]v
new HeapSort() <eh<4_<qF
}; [mcER4]}
0Yk$f1g
public static String toString(int algorithm){ yC:C
return name[algorithm-1]; qNuBK6E#4
} I.6 qA *
, 3&DA
public static void sort(int[] data, int algorithm) { #?h-<KQQ
impl[algorithm-1].sort(data); S'_2o?fs
} TpGnSD
6/dP)"a('
public static interface Sort { q/h, jM
public void sort(int[] data); s~NJy'Y
} ?mp}_x#=
:|HCUZ*H(T
public static void swap(int[] data, int i, int j) { ==Ah& ){4^
int temp = data; t"$#KP<
data = data[j]; ysH'X95
data[j] = temp; Z#t}yC%^d
} o.g)[$M8cF
} 01<Ti"