[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; z_*]joL
} `4.Wdi-Si
int i1=l; aa_&WHXkt
int i2=mid+1; W:aAe%S
for(int cur=l;cur<=r;cur++){ I}puN!
if(i1==mid+1) K?BWl:^x
data[cur]=temp[i2++]; V,<,;d fR
else if(i2>r) RecA?-0
data[cur]=temp[i1++]; G&0&*mp
else if(temp[i1] data[cur]=temp[i1++]; V-}d-Y
else M/5/Tp
data[cur]=temp[i2++]; Y)N(uv6
} A]Zp1XEG
} F4k<YU
D=mU!rjr1
} Y6`9:97
X9/V;!
改进后的归并排序: Mw?nIIu(@
P~#!-9?
package org.rut.util.algorithm.support; CJJ 1aM
G`R Ed-Z[
import org.rut.util.algorithm.SortUtil; 5hB&]6n
"}\2zub9
/** req=w;E:
* @author treeroot (i|`PA
* @since 2006-2-2 gu/eC
* @version 1.0 ,vrdtL
*/ blid* @-
public class ImprovedMergeSort implements SortUtil.Sort { %{yr#F=t#]
@!Il!+^3
private static final int THRESHOLD = 10; zek\AQN
90k|W>
/* 6[69|&
* (non-Javadoc) `-\4Dx1!q
* 3hmuF6y~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p[0Ws460
*/ T?) U|
public void sort(int[] data) { zr&K0a{hc
int[] temp=new int[data.length]; Al3Hu-Hf;`
mergeSort(data,temp,0,data.length-1); Wv77ef
} u4IgPCTZ+
Y5-X)f
private void mergeSort(int[] data, int[] temp, int l, int r) { 1|;WaO1Q
int i, j, k; K>RL
int mid = (l + r) / 2; !H~!i.m'-
if (l == r) =V"ags
return; PP.k>zsx
if ((mid - l) >= THRESHOLD) B6 x5E
mergeSort(data, temp, l, mid); J%aW^+O
else CLQ\Is^]
insertSort(data, l, mid - l + 1); \Wt&z,
if ((r - mid) > THRESHOLD) *gMuo6
mergeSort(data, temp, mid + 1, r); cOOPNa>5_
else agBKp!
insertSort(data, mid + 1, r - mid); e:AB!k^xp$
>6:slNM#
for (i = l; i <= mid; i++) { 7vNS@[8
temp = data; (Uv{%q.n6
} 5;`([oX|_
for (j = 1; j <= r - mid; j++) { :lgIu .
temp[r - j + 1] = data[j + mid]; IhM-a Y y5
} BR*""/3`
int a = temp[l]; @`%.\_
int b = temp[r]; `gfK#0x#
for (i = l, j = r, k = l; k <= r; k++) { AW+4Vm_!l
if (a < b) { ~ZG>n{Q
data[k] = temp[i++]; hYi-F.Qtq
a = temp; 8}xU]N#EV
} else { vIN6W
data[k] = temp[j--]; @a%,0Wn
b = temp[j]; .a;-7|x
} TCmWn$LeE
} dam.D.o"
} ?B@hCd)
GZI[qKDfB
/** i;6\tK"!
* @param data fkRb;aIl
* @param l t,k9:p
* @param i +=\S"e[F
*/ uBl&|yvxB
private void insertSort(int[] data, int start, int len) { qpp:h_E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vk{4:^6.TV
} q69a-5q
} xs.[]>nQN
} ~{2@-qcm
} `+"QhQ4w
sUj#:X
堆排序： H{yPi7 P
dr'6N1B@
package org.rut.util.algorithm.support; &hV;3";
7-^df0
import org.rut.util.algorithm.SortUtil; 7yQ r
.rxc"fR4_
/** qn+mlduU
* @author treeroot Xk7zXah
* @since 2006-2-2 Aqp3amW!
* @version 1.0 xl# j_d,
*/ ?$ YE
public class HeapSort implements SortUtil.Sort{ !Y\hF|[z
uVp R^
/* (non-Javadoc) dW:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UAcABL^2
*/ ceZt%3=5
public void sort(int[] data) { $1Xg[>1g5
MaxHeap h=new MaxHeap(); .`hlw'20
h.init(data); R^PQ`$W 'R
for(int i=0;i h.remove(); ]'M4Unu#@
System.arraycopy(h.queue,1,data,0,data.length); 55,vmDd
} fl)Oto7
4~o\Os+8
private static class MaxHeap{ \u)s Zh
k]f73r
void init(int[] data){ \OY2|
this.queue=new int[data.length+1]; vW]BOzK
for(int i=0;i queue[++size]=data; F"0tv$
fixUp(size); jkD5Z`D
} { ET+V
} E"w7/k#3}C
kkd<CEz2IM
private int size=0; ]?<uf40Mm
zA+^4/M
private int[] queue; %/sf#8^m
?np`RA
public int get() { pD &\Z~5T
return queue[1]; -MOf[f^
} ,u\M7,a^
K-#Rm%J+Wy
public void remove() { h|jsi*4NnL
SortUtil.swap(queue,1,size--); xvrCm`3n@
fixDown(1); <X;y 4lPZ
} | @mZ]`p
file://fixdown Y<kvJb&1*
private void fixDown(int k) { nE/T)[1|
int j; ^M,Q<HL
while ((j = k << 1) <= size) { y#T":jpR
if (j < size %26amp;%26amp; queue[j] j++; 6lZhV[~Z/
if (queue[k]>queue[j]) file://不用交换 .c BJA&/
break; [!DLT6Qk
SortUtil.swap(queue,j,k); ggbew6L$Z
k = j; \hm=AGI0
} ';$2j~
} SM@1<OCc
private void fixUp(int k) { <0lfkeD
while (k > 1) { .Mm8\].
int j = k >> 1; cG^'Qm
if (queue[j]>queue[k]) M)-+j{<
break; M%6{A+(
SortUtil.swap(queue,j,k); OcIJT1
k = j; ZpWG
} Ip<STz]-
} C' ny 2>uA
oOSw>23x
} ;O.U-s
F lbL`@4M
} uTn(fs)D
Bz]64/
SortUtil： PUucYc
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package org.rut.util.algorithm; ^i@tOtS
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import org.rut.util.algorithm.support.BubbleSort; s8 3_Bd
import org.rut.util.algorithm.support.HeapSort; dD!} P$
import org.rut.util.algorithm.support.ImprovedMergeSort; GyT{p#l
import org.rut.util.algorithm.support.ImprovedQuickSort; V4xZC\)Gk
import org.rut.util.algorithm.support.InsertSort; JYKaF6bx8
import org.rut.util.algorithm.support.MergeSort; Y[*z6gP(
import org.rut.util.algorithm.support.QuickSort; nCYicB
import org.rut.util.algorithm.support.SelectionSort; 2uU~$7~N
import org.rut.util.algorithm.support.ShellSort; "-N%`UA
.D>%-
/** syV&Ds)
* @author treeroot 5\qoZs*e
* @since 2006-2-2 [x,_0-_
* @version 1.0 ud!iy
*/ X0p=jBye~>
public class SortUtil { $yhQ)@#1
public final static int INSERT = 1; Ugrcy7
public final static int BUBBLE = 2; 1*(^<x+n
public final static int SELECTION = 3; ?%;)> :3N
public final static int SHELL = 4; orEwP/L:
public final static int QUICK = 5; ]<TgBo|
public final static int IMPROVED_QUICK = 6; HJoPk'p%
public final static int MERGE = 7; .:$%3#N$(Y
public final static int IMPROVED_MERGE = 8; :DQHb"(
public final static int HEAP = 9; V,{ydxfB
a?&oOQd-iP
public static void sort(int[] data) { C:$lH
sort(data, IMPROVED_QUICK); ~@TNVkw
} IjJ3./L!5
private static String[] name={ .hBE&Y>\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S}ZM;M
}; %6dFACv
YVqhX]/
private static Sort[] impl=new Sort[]{ 0SA c1
new InsertSort(), Zwp*JH+G
new BubbleSort(), )7O4j}B){
new SelectionSort(), j$Gb>Ex>
new ShellSort(), @yS
new QuickSort(), rhwY5FD?
new ImprovedQuickSort(), -=O9D-x=
new MergeSort(), 4vGkgH<,
new ImprovedMergeSort(), CzST~*lH
new HeapSort() |"vqM)V$
}; pH'#v]"
jK3% \`o
public static String toString(int algorithm){ Kh'/Ne?
return name[algorithm-1]; :!'aP\uE
} Tld%NE
Y(W>([59
public static void sort(int[] data, int algorithm) { r4A%`sk@
impl[algorithm-1].sort(data); ]X;Ty\UD&
} w\8grEj
mEr*n
public static interface Sort { tDF6%RG
public void sort(int[] data); d,6 Z
} xSug-
,8cw jS2E
public static void swap(int[] data, int i, int j) { 9Clddjf?c
int temp = data; b.Z K1
data = data[j]; %'%r.
data[j] = temp; {&,a)h7&
} f[!N]*
} v/}M_E