[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; 9#ZzE/
} 9GtLMpy
int i1=l; ixg\[5.Q+
int i2=mid+1; F|9a}(-7
for(int cur=l;cur<=r;cur++){ dP?nP(l
if(i1==mid+1) L(W%~UGN V
data[cur]=temp[i2++]; B$@1QG
else if(i2>r) \MF3CK@/
data[cur]=temp[i1++]; !'+\]eA
else if(temp[i1] data[cur]=temp[i1++]; 6Q?BwD+>
else 9fCiLlI
data[cur]=temp[i2++]; _xa}B,H
} |h
} |C^ c0
5aa}FdUq
} b$PT_!d
/5&3WG&<u
改进后的归并排序: O 0Vn";Q 4
7ZL,p:f
package org.rut.util.algorithm.support; +Kxe ymwr2
i-|/2I9%
import org.rut.util.algorithm.SortUtil; y?[5jL|Ue
MX"A@p~H
/** u}Lc|_ea`
* @author treeroot b0!*mrF]6
* @since 2006-2-2 oXnC"y}0P
* @version 1.0 t`N ">c"
*/ (N)r#"FV
public class ImprovedMergeSort implements SortUtil.Sort { lpIteZw:
cdd P T
private static final int THRESHOLD = 10; ZD$-V3e`
VFQq`!*i
/* NEjPU#@c
* (non-Javadoc) MtMvpHk
* Z&AHM &,yj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 45]Ym{]
*/ #|)JD@;Q
public void sort(int[] data) { LsuAOB 8
int[] temp=new int[data.length]; 9:bh3@r/
mergeSort(data,temp,0,data.length-1); 9O(i+fM
} eD>-`'7<
2U-#0,ll]
private void mergeSort(int[] data, int[] temp, int l, int r) { Zm"!E6`69
int i, j, k; ,-w-su=J_
int mid = (l + r) / 2; K,`).YK
if (l == r) R[mH35D/
return; 7j9D;_(.^$
if ((mid - l) >= THRESHOLD) =NVZ$KOZ
mergeSort(data, temp, l, mid); C:|q'"F
else WZ-4^WM=!
insertSort(data, l, mid - l + 1); L8,H9T#e
if ((r - mid) > THRESHOLD) B:R7[G;1
mergeSort(data, temp, mid + 1, r); @d8&3@{R^
else $Uv<LVd(
insertSort(data, mid + 1, r - mid); Pn'QOVy
u|_ITwk
for (i = l; i <= mid; i++) { $@+p~)r(l
temp = data; M"$jpBN*
} 7Va#{Y;Zy
for (j = 1; j <= r - mid; j++) { N"q+UCRC
temp[r - j + 1] = data[j + mid]; J4Q)`Y\~
} ~:P8g<w
int a = temp[l]; 2n-Tpay0
int b = temp[r]; ')1}#V/I
for (i = l, j = r, k = l; k <= r; k++) { S0Rf>Eo4
if (a < b) { ihpz}g
data[k] = temp[i++]; .N-'; %8
a = temp; #cSw"A
} else { <3],C)Zwc
data[k] = temp[j--]; AAlmG9l&7
b = temp[j]; Ee$"O6*!
} fl5UY$a2-
} E :'
} d[P>jl%7
wB1-|=K1
/** !}Woo$#ND
* @param data (dO'_s&M]/
* @param l o3\SO
* @param i *_"c!eW
*/ 8JjU 9#
private void insertSort(int[] data, int start, int len) { M2zos(8g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5CRc]Q#@
} web8QzLLB
} OI]K_ m3
} c4qp3B_w
} R&x7Iq:=D
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堆排序： x[.z"$T@
buCm @@o
package org.rut.util.algorithm.support; 1O'*X
.JD4gF2N
import org.rut.util.algorithm.SortUtil; 3-_U-:2"
N,sqrk]
/** &"r==A?
* @author treeroot \^;|S
* @since 2006-2-2 1K*f4BnDr~
* @version 1.0 Z@c0(ol
*/ yG4LQE
public class HeapSort implements SortUtil.Sort{ ]\os`At
vhE}{ED
/* (non-Javadoc) LBbo.KxAe3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?V\9,BTb)
*/ bHWvKv+
public void sort(int[] data) { TW-zh~|F
MaxHeap h=new MaxHeap(); ~\@<8@N2a6
h.init(data); K+`-[v5\
for(int i=0;i h.remove(); kb}]sj
System.arraycopy(h.queue,1,data,0,data.length); Fgc:6<MGM
} #1qVFU
S\{^LVXTMd
private static class MaxHeap{ S'%cf7Z
eB/hyC1
void init(int[] data){ (&Tb,H)=
this.queue=new int[data.length+1]; HA3SQ
for(int i=0;i queue[++size]=data; ad3z]dUZ9
fixUp(size); .'NO~
} C$..w80/1
} bh;b` 5
!ovZ>,1
private int size=0; }96/: ;:k
YL&b9e4
private int[] queue; _G}CD|Kx
ubN"(F:!-S
public int get() { eI=Y~jy
return queue[1]; 7L~ zI>2
} Sfr\%Buv
T>uWf#&pjs
public void remove() { g`5`KU|
SortUtil.swap(queue,1,size--); <cfH'~
fixDown(1); j2{,1hj
} {, *Y
file://fixdown 2Fp]S a
private void fixDown(int k) { O"s`-OM;n
int j; ^s(X VVA
while ((j = k << 1) <= size) { aa YQ<
if (j < size %26amp;%26amp; queue[j] j++; 3RH#e1Y
if (queue[k]>queue[j]) file://不用交换 neY=:9
break; */Ry6Yu
SortUtil.swap(queue,j,k); 9bcyPN
k = j; ,w/mk$v
} hC 4X Y
} j+B5m:ExfI
private void fixUp(int k) { O]%m{afM
while (k > 1) { luz%FY:
int j = k >> 1; uI-76
if (queue[j]>queue[k]) C7 & 6rUX
break; W.6JnYLQ&
SortUtil.swap(queue,j,k); ZEyGqCf3
k = j; V8U`%/`N
} /%q9hI
} !wb~A0m
t>h i$NX{p
} 3ws(uF9$
-.Pu5et4
} -x%`Wv@L
0)Um W{
SortUtil： 6RT0\^X*:
kcz#8K]~
package org.rut.util.algorithm; =UKR<@QrK
.bBQhf.&"
import org.rut.util.algorithm.support.BubbleSort; H{A| ~V)
import org.rut.util.algorithm.support.HeapSort; 't%%hw-m}
import org.rut.util.algorithm.support.ImprovedMergeSort; w3bH|VnU8;
import org.rut.util.algorithm.support.ImprovedQuickSort; pA,EUh|H
import org.rut.util.algorithm.support.InsertSort; >0+|0ba
import org.rut.util.algorithm.support.MergeSort; A"3&EuvU
import org.rut.util.algorithm.support.QuickSort; yjFQk,A
import org.rut.util.algorithm.support.SelectionSort; ?kFCYZK|"
import org.rut.util.algorithm.support.ShellSort; JO^ [@
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/** #IrP"j^
* @author treeroot '%RK KA
* @since 2006-2-2 56 kgL;$h
* @version 1.0 e%c5OZ3~
*/ ~$ qJw?r
public class SortUtil { N[bf.5T
public final static int INSERT = 1; -r'seb5
public final static int BUBBLE = 2; XM@i|AK M0
public final static int SELECTION = 3; ]j$p_s>
public final static int SHELL = 4; [ EID27P
public final static int QUICK = 5; q.b4m 'J
public final static int IMPROVED_QUICK = 6; {2clOUi
public final static int MERGE = 7; Tl7:}X<?
public final static int IMPROVED_MERGE = 8; Hi" n GH
public final static int HEAP = 9; v9`B.(Ru
a<"& RnG(
public static void sort(int[] data) { _xL&sy09t
sort(data, IMPROVED_QUICK); /FV6lR!0^
} vrnj}f[h
private static String[] name={ Yg,lJ!q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ow$l!8
}; 9}0Jc(B/x
M-K@n$k
private static Sort[] impl=new Sort[]{ 3N*C]
new InsertSort(), q[+:t
new BubbleSort(), I_I;.Ik
new SelectionSort(), W (c\$2`
new ShellSort(), ;xtb2c8HT
new QuickSort(), &r5%WRzpYT
new ImprovedQuickSort(), -x\l<\*
new MergeSort(), _7"W\gn:9
new ImprovedMergeSort(), RkP|_Bf8)
new HeapSort() d#:J\2V"R
}; p}|wO&4h
dB/I2uGl>
public static String toString(int algorithm){ UkbQ'P+oS
return name[algorithm-1]; H1qw1[%0y
} `[:1!I.}-
"_@+/Iy.
public static void sort(int[] data, int algorithm) { ZV4' |q
impl[algorithm-1].sort(data); ',s7h"
} :9q^
5N+(Gv[`"
public static interface Sort { dB)hW'J?
public void sort(int[] data); ]%8;c
} >P"/nS"nn
+Qb/:xQu
public static void swap(int[] data, int i, int j) { pz}hh^]t
int temp = data; Y'*h_K
data = data[j]; '?GZ"C2
data[j] = temp; 5d{Ggg{s
} H>X1(sh#}
} %_O>Hy|p