[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; 6x_T@
} 4L5o\'X
int i1=l; ieo|%N{'
int i2=mid+1; Z&FkLww
for(int cur=l;cur<=r;cur++){ x" 'KW (
if(i1==mid+1) K DYYB6|
data[cur]=temp[i2++]; {)V?R
else if(i2>r) JBR[; zM
data[cur]=temp[i1++]; !TP6=ks
else if(temp[i1] data[cur]=temp[i1++]; ~n[b^b
else =s'XR@
data[cur]=temp[i2++]; &:V@2_6"
} -B1YZ/.rz"
} 4K9Rpm
'aD6>8/Hj
} nW4Vct
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改进后的归并排序: u12zRdn
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package org.rut.util.algorithm.support; E@w[&#
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import org.rut.util.algorithm.SortUtil; J=UZ){c>:.
Bx(yu'g|a
/** ! FNf>z+
* @author treeroot 5x8'K7/4.
* @since 2006-2-2 YywEZ?X
* @version 1.0 ],8;eq%W)
*/ E: 9o;JU
public class ImprovedMergeSort implements SortUtil.Sort { % f2<U;ff
iQt!PMF.
private static final int THRESHOLD = 10; b5AGk
2B7h9P.NB
/* &*B>P>x
* (non-Javadoc) izCaB~{/
* '#v71,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mCM|&u
*/ [2Iau1<@
public void sort(int[] data) { l8z%\p5cR
int[] temp=new int[data.length]; 6W5d7`A
mergeSort(data,temp,0,data.length-1); Lf >YdD
} 4s9c#nVlu
$v]T8|h
private void mergeSort(int[] data, int[] temp, int l, int r) { ajW[eyX
int i, j, k; nV'3sUvR#
int mid = (l + r) / 2; $#5klA
if (l == r) Bi]D{m9
return; ~}BJ0P(VMc
if ((mid - l) >= THRESHOLD) _=ugxL #eB
mergeSort(data, temp, l, mid); W1vCN31
else Fse['O~
insertSort(data, l, mid - l + 1); eY T8$
if ((r - mid) > THRESHOLD) M[~Jaxw%
mergeSort(data, temp, mid + 1, r); bSQRLxF
else O -G1})$
insertSort(data, mid + 1, r - mid); TWUUvj`.
AzZJG v]H
for (i = l; i <= mid; i++) { 1e/L\Y=m
temp = data; l '/N3&5
} 3[VWTq)D=
for (j = 1; j <= r - mid; j++) { [*<.?9n)or
temp[r - j + 1] = data[j + mid]; (vKI1^,
} }mKwFVZ
int a = temp[l]; $,TGP+vH
int b = temp[r]; :/B:FY=
for (i = l, j = r, k = l; k <= r; k++) { {VR`;
if (a < b) { ( :{"C6x
data[k] = temp[i++]; NS@{~;#R
a = temp; sGSsUO:@j;
} else { ,'~#Ch
data[k] = temp[j--]; Jy9bY
b = temp[j]; !2z!8kI
} l]H0g[
} !#?8BwnaZ
} O}QFq14<+
Rp0|zP,5
/** +P|2m"UA
* @param data vv &BhIf3
* @param l D}w<84qX
* @param i n12UBvc}%
*/ a5a1'IVq
private void insertSort(int[] data, int start, int len) { !i^]UN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }qAVN
} "A;s56}'&
} =`-|&
} :j@8L.<U
} (3VGaUlx
),=@q+{E{
堆排序： V5AW&kfd
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package org.rut.util.algorithm.support; ;UrK{>B
;|<(9u`
import org.rut.util.algorithm.SortUtil; ~Q?!W0ZBE
CZY7S*fL
/** [![ G7H%f
* @author treeroot 3y ryeS
* @since 2006-2-2 .5.8;/ /
* @version 1.0 jq(qo4~;
*/ 0 " y%9
public class HeapSort implements SortUtil.Sort{ # ORO&78
Rn-G @}f
/* (non-Javadoc) W5.Va.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dAL3.%
*/ /Wu|)tx
public void sort(int[] data) { ]9*;;4Mg
MaxHeap h=new MaxHeap(); `XW*kxpm
h.init(data); @DuK#W"E u
for(int i=0;i h.remove(); 03([@d6<E
System.arraycopy(h.queue,1,data,0,data.length); zmiZ]uq
} tiYOMA
A2NF<ZsD
private static class MaxHeap{ G`F8!O(
"~/9F
void init(int[] data){ QL97WK\$
this.queue=new int[data.length+1]; ;wR 'z$8
for(int i=0;i queue[++size]=data; RPH1''*!
fixUp(size); B76 v}O:
} 44HiTWQS?l
} .'1SZe7O
~zF2`.
private int size=0; , ECLqs%
oq$w4D0Z
private int[] queue; (e9fm|n!)|
+?[BU<X6u
public int get() { 8:thWGLN
return queue[1]; (PRBS\*G
} D. Kqc
6;+jIkkD)
public void remove() { 5wT>N46UX
SortUtil.swap(queue,1,size--); }mZVL~|V
fixDown(1); d"ZU y!a
} )\ZzTS
file://fixdown 7?nJ4x1
private void fixDown(int k) { dlDki.
int j; ufrqsv]=
while ((j = k << 1) <= size) { >$H|:{D
if (j < size %26amp;%26amp; queue[j] j++; `#Kx|x6
if (queue[k]>queue[j]) file://不用交换 +7U
break; <x0H@?f7
SortUtil.swap(queue,j,k); zN~6HZ_:^
k = j; 7NL%$Vf
} d-B7["z,
} S&(^<gwl
private void fixUp(int k) { ^$-Ye]<
while (k > 1) { [ohBPQO
int j = k >> 1; \.#p_U5In
if (queue[j]>queue[k]) " xR[mJ@U
break; 1ibnx2^YB
SortUtil.swap(queue,j,k); <7XT\?%F
k = j; ,*Z.
} HjA_g0u
} (qBvoLkF9N
ys'T~Cs
} @I-Lv5
v,OpTu:1
} QA;!caNp
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SortUtil： W3rl^M=r
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package org.rut.util.algorithm; o''wCr%
iY0>lDFm.
import org.rut.util.algorithm.support.BubbleSort; ^"i~DC
import org.rut.util.algorithm.support.HeapSort; wX,F`e3"/
import org.rut.util.algorithm.support.ImprovedMergeSort; +fNvNbtA
import org.rut.util.algorithm.support.ImprovedQuickSort; A8DFm{})c
import org.rut.util.algorithm.support.InsertSort; @5VV|Wt=
import org.rut.util.algorithm.support.MergeSort; Zy0aJN>
import org.rut.util.algorithm.support.QuickSort; +4qU>
import org.rut.util.algorithm.support.SelectionSort; |Au]1}
import org.rut.util.algorithm.support.ShellSort; L}sx<=8.m
g{:<2xI5P
/** MYLsHIPC
* @author treeroot '+Xlw
* @since 2006-2-2 Bs;|D
* @version 1.0 PdeBDFWD
*/ JkQ\)^5v
public class SortUtil { ;V5yXNQ
public final static int INSERT = 1; '5KeL3J;
public final static int BUBBLE = 2; atF?OP|{,w
public final static int SELECTION = 3; 5x8+xw3Eh
public final static int SHELL = 4; 57,dw-|xi
public final static int QUICK = 5; a%vrt)Gx
public final static int IMPROVED_QUICK = 6; ]N{0:Va@D
public final static int MERGE = 7; Anm=*;*M`
public final static int IMPROVED_MERGE = 8; beXNrf=bG
public final static int HEAP = 9; sJG5/w
hk>;pU(
public static void sort(int[] data) { I?Aj.{{$G%
sort(data, IMPROVED_QUICK); )C%N]9FvY
} d3;qsUh$yv
private static String[] name={ x=Hndx^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &M/>tEZ)
}; I+(/TP
Vz=auM1xZ
private static Sort[] impl=new Sort[]{ eH%RNtP`
new InsertSort(), OJAIaC\
new BubbleSort(), qMYe{{r
new SelectionSort(), 8,"yNq
new ShellSort(), Q{g;J`Z)p
new QuickSort(), Tr&M~Lgb)
new ImprovedQuickSort(), 2aN<w'pA
new MergeSort(), U/l?>lOD\
new ImprovedMergeSort(), I=DxRgt
new HeapSort() 7q=G&e7
}; g'$tj&Vk:
!g!5_|
public static String toString(int algorithm){ qJ4T]FVN
return name[algorithm-1]; 790-)\:CY
} r|Z5Xc
a2 +~;{?g
public static void sort(int[] data, int algorithm) { J%H;%ROx
impl[algorithm-1].sort(data); (la[KqqCO
} U_GgCI)
rQ`i8GF
public static interface Sort { o=J9
public void sort(int[] data); }J:+{4Yn
} 5N[9 vW
8flOq"uK^
public static void swap(int[] data, int i, int j) { [U@;\V$
int temp = data; UBv@+\Y8m
data = data[j]; v *-0M
data[j] = temp; vmTs9"ujF,
} PQN@JaD
} cTTW06^