[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; V_^pPBa
} Uv?^qe0=
int i1=l; ~T9QpL1OJ
int i2=mid+1; q|klsup
for(int cur=l;cur<=r;cur++){ kwww5p ["
if(i1==mid+1) aox@- jyr
data[cur]=temp[i2++]; TWRnty-C
else if(i2>r) Wd+kjI\
data[cur]=temp[i1++]; <tO@dI$~>
else if(temp[i1] data[cur]=temp[i1++]; 1DU l<&4
else GM8>u O
data[cur]=temp[i2++]; >'m&/&h
} `X()"Qw
} 'b[O-6v
ETX>wZ
} AL&<SxuP
eC 2~&:$L
改进后的归并排序: 04-@c
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package org.rut.util.algorithm.support; f;+.j/ +
4S+E%b|)
import org.rut.util.algorithm.SortUtil; pP# _B
EHl~y=9
/** gs.+|4dv
* @author treeroot 18kWnF]n=
* @since 2006-2-2 4y4r;[@U
* @version 1.0 <%|u1cn~!v
*/ 7N5M=f.DS(
public class ImprovedMergeSort implements SortUtil.Sort { +|<bb8%
-)&lsFF
private static final int THRESHOLD = 10; 2=<,#7zlJ
} nIYNeP?D
/* !Dc;R+Ir0!
* (non-Javadoc) x~IrqdmW
* .4w"3>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p_zVrlVb
*/ Jp8,s%
public void sort(int[] data) { W?N+7_%'
int[] temp=new int[data.length]; S<*1b 6%D
mergeSort(data,temp,0,data.length-1); +?QHSIQo
} sVnq|[ /
xudZ7
private void mergeSort(int[] data, int[] temp, int l, int r) { .W9 *-
int i, j, k; C=K{;.
int mid = (l + r) / 2; -IDhK}C&T
if (l == r) {~#01p5
return; ht+wi5b
if ((mid - l) >= THRESHOLD) c>r~pY~$
mergeSort(data, temp, l, mid); b;vVlIG
else Dl\0xcE
insertSort(data, l, mid - l + 1); -EU=R_yg
if ((r - mid) > THRESHOLD) q{[y4c1bG{
mergeSort(data, temp, mid + 1, r); gtY7N>e
else 4Pf"R~&[
insertSort(data, mid + 1, r - mid); \|4F?Y
OB+cE4$
for (i = l; i <= mid; i++) { kA2)T,s74
temp = data; HFYe@2r
} ljg6uz1v%
for (j = 1; j <= r - mid; j++) { `USze0"t0:
temp[r - j + 1] = data[j + mid]; ^"uD:f)
} n"~K",~P
int a = temp[l]; l r~>!O
int b = temp[r]; >r4BI}8SK<
for (i = l, j = r, k = l; k <= r; k++) { u2':~h?l
if (a < b) { c*(=Glzn
data[k] = temp[i++]; rc`Il{~k
a = temp; w8KxEV=
} else { ;?-{Uk
data[k] = temp[j--]; E1A5<^t
b = temp[j]; O|9Nl*rXz
} q}E'x/s2m
} h9nh9a(2
} hA`9[58/
O!F"w!5@
/** 0N6 X;M{zh
* @param data wSALK)T1{
* @param l _jVJkg)]
* @param i ;ae6h [
*/ Kr4%D*
private void insertSort(int[] data, int start, int len) { daf-B-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,z((?h,nm
} e)L!4Y44K
} "`pg+t&
} zR=g<e1xe
} bDegIW/'w
JmBMc}54
堆排序： :X1Y
N>@.(f&w
package org.rut.util.algorithm.support; vMJC
$M|vIw{#
import org.rut.util.algorithm.SortUtil; Aq$o&t
[2 Rz8e^
/** "/hLZl
* @author treeroot MGo`j:0
* @since 2006-2-2 %7Gq#rq
* @version 1.0 n*~#]%4
*/ UyMlk
public class HeapSort implements SortUtil.Sort{ '?$<k@mJW
I wu^@
/* (non-Javadoc) PhmtCp0-7-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3 "|A5>Vo
*/ C+C1(b;1
public void sort(int[] data) { 0.wN&:I8t
MaxHeap h=new MaxHeap(); L_=3`xE _
h.init(data); ^<aj~0v
for(int i=0;i h.remove(); a uve&y"R
System.arraycopy(h.queue,1,data,0,data.length); G<~P||Lu^
} "(a}}q 9-
)9!J $q
private static class MaxHeap{ Y~OyoNu2
7l'1
void init(int[] data){ .4=A:9
this.queue=new int[data.length+1]; ]/mRMm9"3h
for(int i=0;i queue[++size]=data; Yp$@i20
fixUp(size); w#sP5qKv8
} S~y.>X3"P
} z+?48}
Ap}`Q(.
private int size=0; _`9WNJiL
uVw|jj
private int[] queue; S.owVMQ
<FvljKuq+
public int get() { 0B5d$0
return queue[1]; ]mi)x63^
} }sfvzw_
M !rw!,g
public void remove() { gf,[GbZ
SortUtil.swap(queue,1,size--); ZZ].h2=K
fixDown(1); wY7+E/
} 3cFvS[JG
file://fixdown u z:@
private void fixDown(int k) { MIc(B_q
int j; mZ#IP
while ((j = k << 1) <= size) { 8w3Wy<}y
if (j < size %26amp;%26amp; queue[j] j++; T(*A0
if (queue[k]>queue[j]) file://不用交换 uq]E^#^
break; \&s$?r
SortUtil.swap(queue,j,k); GS!1K(7
k = j; Uetna!ABB
} 0MOn>76$N
} wq#'o9s,
private void fixUp(int k) { =ZARJ40L
while (k > 1) { 3>^S6h}o
int j = k >> 1; u$1^=
if (queue[j]>queue[k]) 5S #6{Y =
break; \Xg`@JrTM
SortUtil.swap(queue,j,k); ;;zd/n2b
k = j; rGSi !q
} A)f/ww)Q
} 1h?:gOig
A)TO<dl
} }ev+WIERQV
]8XIw`:f
} zS}!87r)
@<p9O0
SortUtil： 4"V6k4i5
S)A;!}RK6
package org.rut.util.algorithm; Ns[.guWu-
%VgK::)r
import org.rut.util.algorithm.support.BubbleSort; d#HN'(2t
import org.rut.util.algorithm.support.HeapSort; ; 5!8LmZ0#
import org.rut.util.algorithm.support.ImprovedMergeSort; ;:ocU?
import org.rut.util.algorithm.support.ImprovedQuickSort; $/P\@|MqYQ
import org.rut.util.algorithm.support.InsertSort; 8EZ,hY^
import org.rut.util.algorithm.support.MergeSort; 9CHn6 v ~)
import org.rut.util.algorithm.support.QuickSort; vP/sG5$x
import org.rut.util.algorithm.support.SelectionSort; 1);E!D[
import org.rut.util.algorithm.support.ShellSort; G)7J$4R
hmtDw,j
/** !9=Y(rb
* @author treeroot > ,P,{"
* @since 2006-2-2 f.U.(
* @version 1.0 7, :l\t
*/ :N:e3$c
public class SortUtil { BKW%/y"
public final static int INSERT = 1; S L~5[f
public final static int BUBBLE = 2; 8)&J oPN
public final static int SELECTION = 3; !Y]%U @4}
public final static int SHELL = 4; ._}Dqg$
public final static int QUICK = 5; M0uC0\'#P
public final static int IMPROVED_QUICK = 6; ~RnBs`&!
public final static int MERGE = 7; qnU$Pd
public final static int IMPROVED_MERGE = 8; lKy4Nry9
public final static int HEAP = 9; 1?#Wg>7'
X\]Dx./
public static void sort(int[] data) { qk\LfRbj
sort(data, IMPROVED_QUICK); ig:z[k?
} \&%y4=y<sE
private static String[] name={ x!9bvQT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ut9R]01:
}; v1Jg8L=
AG,;1b,:81
private static Sort[] impl=new Sort[]{ \!'K#%]9
new InsertSort(), +Ram%"Zwh
new BubbleSort(), /Oa.@53tK6
new SelectionSort(), '5SO3/{b
new ShellSort(), %Z#[{yuFs
new QuickSort(), Ya,(J0l
new ImprovedQuickSort(), ^NOy:>
new MergeSort(), =zKbvwe%X
new ImprovedMergeSort(), }{ "RgT-qG
new HeapSort() \E2S/1p
}; A/*h[N+2!
AV["%$:
public static String toString(int algorithm){ 7:h_U9Za?$
return name[algorithm-1]; ?nx 1{2[
} Q02:qn?T
U7Pn $l2!
public static void sort(int[] data, int algorithm) { 8*yky
impl[algorithm-1].sort(data); !fG`xZ~
} V@1K
>oc&hT
public static interface Sort { v`u>;S_
public void sort(int[] data); 7)v`l1
} q e;O Ox
"0l7%@z*)q
public static void swap(int[] data, int i, int j) { d`4@aoM
int temp = data; qy~@cPT
data = data[j]; 9mH+Ol#(
data[j] = temp; vD4<G{
} d9uT*5f
} 9w,u4q