[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; |"S#uJW
} >Vg [A
int i1=l; {`e-%<
int i2=mid+1; 7a^D[f0V
for(int cur=l;cur<=r;cur++){ `M{Ne:J
if(i1==mid+1) LI&E.(:
data[cur]=temp[i2++]; 3 S*KjY'@
else if(i2>r) pKGhNIj$
data[cur]=temp[i1++]; Vh2uzG
else if(temp[i1] data[cur]=temp[i1++]; x*RSD,3
else nC!]@lA
data[cur]=temp[i2++]; i$`o,m#
} 12?!Z
} r:$*pC&{
m#i4_F=^b
} e|5@7~Vi
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改进后的归并排序: -iY-rzW
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package org.rut.util.algorithm.support; GAZRQ
s6Dkh}:d
import org.rut.util.algorithm.SortUtil; (5,x5l]-N
kFY2VPP~
/** fR~0Fy Gp
* @author treeroot ;(J&%
* @since 2006-2-2 '/t9#I@G\
* @version 1.0 hdcB*j?4
*/ >HRNB&]LdP
public class ImprovedMergeSort implements SortUtil.Sort { -Eig#]Se3
=:xX~,qmv
private static final int THRESHOLD = 10; UNwjx7usD
BDzAmrO<
/* B|yz~wuS
* (non-Javadoc) hN~H8.g
* '+ZJf&Ox
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w{|`F>f9
*/ *s-s1v
public void sort(int[] data) { );_/0:
int[] temp=new int[data.length]; ^Ifm1$X}
mergeSort(data,temp,0,data.length-1); U<Qi`uoj!
} +N7<[hE;
EJMd[hMhe
private void mergeSort(int[] data, int[] temp, int l, int r) { r<Z.J/a
int i, j, k; Eb@**%
int mid = (l + r) / 2; esE!i0%
if (l == r) kX`m( N$
return; N*6~$zl&
if ((mid - l) >= THRESHOLD) o|vL:| 8Q
mergeSort(data, temp, l, mid); =Ul"{T<
else =$^90Q,Z;
insertSort(data, l, mid - l + 1); 1gcWw, /
if ((r - mid) > THRESHOLD) 6-tIe_5
mergeSort(data, temp, mid + 1, r); /W-ges
else S[yrGX8lu
insertSort(data, mid + 1, r - mid); VpAwvMw
@ext6cFe3<
for (i = l; i <= mid; i++) { =+Odu
temp = data; iY?#R&
} _&U#*g
for (j = 1; j <= r - mid; j++) { 9-q> W
temp[r - j + 1] = data[j + mid]; d$x vEm
} cYe2a"
int a = temp[l]; u-s*k*VHoc
int b = temp[r]; ,}@4@ >?K
for (i = l, j = r, k = l; k <= r; k++) { #NGtba
if (a < b) { 7&wxnxSk^
data[k] = temp[i++]; I{>Z0+
a = temp; :_:)S
} else { %72(gR2Wa2
data[k] = temp[j--]; 8>LDo"<
b = temp[j]; M%Rr=
} >o{JG(Rn
} 4e.19H9
} E`(=n(Qu
KS$"Re$
/** I= <eCv
* @param data koS?UYF`
* @param l )u28:+8
* @param i "*j8G8
*/ 9ZU^([@D
private void insertSort(int[] data, int start, int len) { *QWOWg4w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /SS~IhUX
} J?X{NARt
} fe`_0lxj
} vzbGLap#
} M|h B[
j$XaO%y)
堆排序： v=hn# U
xyM|q9Gf@
package org.rut.util.algorithm.support; &0y`Gt
yEbo`/ ]b
import org.rut.util.algorithm.SortUtil; %HtgZeY
Z|N$qm}
/** ~$C<^?"b
* @author treeroot Gos#=H
* @since 2006-2-2 Y@#N_]oXj
* @version 1.0 nh5=0{va|L
*/ _izjvg
public class HeapSort implements SortUtil.Sort{ g]}!
0%[IG$u)|
/* (non-Javadoc) kh=<M{-t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p4k}B. f
*/ X=abaKl
public void sort(int[] data) { f~Pce||e
MaxHeap h=new MaxHeap(); irq{ 21
h.init(data); IvkYM`%
for(int i=0;i h.remove(); ::#[lw
System.arraycopy(h.queue,1,data,0,data.length); 9$e$L~I#u
} .;Gx.}ITG6
7=u Gf$/
private static class MaxHeap{ +^esL9RG:
X0^@E
void init(int[] data){ /FC HF#yK
this.queue=new int[data.length+1]; S2Ez}*plp
for(int i=0;i queue[++size]=data; :;+_<pk
fixUp(size); .81Y/Gad_
} tA< UkPT
} kqj)&0|X
F:P2:s<d-
private int size=0; rb4;@&
F7*)u-4Yn
private int[] queue; ^Mq@} 0
[pmIQ228
public int get() { ~+t@7A=
return queue[1]; u*I'c2m
} !1i-"rR
R-NM ~gp
public void remove() { &k_*Y-l7]
SortUtil.swap(queue,1,size--); umq6X8K
fixDown(1); T*0;3&sA
} Keo<#Cc?
file://fixdown hF@%k ;I
private void fixDown(int k) { zng.(]U/?H
int j; ovM;6o
while ((j = k << 1) <= size) { n YUFRV$
if (j < size %26amp;%26amp; queue[j] j++; >2pxl(i
if (queue[k]>queue[j]) file://不用交换 uHZ4 @w:
break; u<fZ.1
SortUtil.swap(queue,j,k); %PB{jo
k = j; P/1YN
} 1|xe'w{
} D^m2iW;
private void fixUp(int k) { 0?/gEr
while (k > 1) { ^zO{Aks
int j = k >> 1; 'fb\t,
if (queue[j]>queue[k]) 9U.Ctx:F
break; !i (V.A
SortUtil.swap(queue,j,k); fi*b]a\'
k = j; < B]qqqP
} &QfEDDJ
} ,'`yh|}G\
&uO-h
} 612,J
F$ G)vskd
} '5$@I{z
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SortUtil： .0xk},
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package org.rut.util.algorithm; `4xQ#K.-
YU[#4f~
import org.rut.util.algorithm.support.BubbleSort; 0wVM%Dng
import org.rut.util.algorithm.support.HeapSort; tl!dRV92
import org.rut.util.algorithm.support.ImprovedMergeSort; AQQa6Ce*
import org.rut.util.algorithm.support.ImprovedQuickSort; gM;m{gXYK
import org.rut.util.algorithm.support.InsertSort; /"k[T
import org.rut.util.algorithm.support.MergeSort; \ZV>5N3hS
import org.rut.util.algorithm.support.QuickSort; $3p48`.\
import org.rut.util.algorithm.support.SelectionSort; 3'0vLi
import org.rut.util.algorithm.support.ShellSort; >]ux3F3\
F>#F@j^c
/** I9+h-t
* @author treeroot 80Fa i
* @since 2006-2-2 XPMUhozV
* @version 1.0 \C>IVz<O
*/ ;K8}Yq9p9
public class SortUtil { rm3/R<
public final static int INSERT = 1; JHm Pa
public final static int BUBBLE = 2; $},XRo&R
public final static int SELECTION = 3; }`QZV_
public final static int SHELL = 4; KyVzf(^
public final static int QUICK = 5; BRY/[QRqZ
public final static int IMPROVED_QUICK = 6; -o"b$[sf=Z
public final static int MERGE = 7; tR<#CCtRp'
public final static int IMPROVED_MERGE = 8; 0vSPeZ
public final static int HEAP = 9; }1k?th
*Us}E7/"'
public static void sort(int[] data) { L(Twclrb
sort(data, IMPROVED_QUICK); 0<@['W}G
} \rUKP""m
private static String[] name={ 8VQ!&^9!U#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5;/q[oXI
}; }2RbX,0l9
E+XS7':I
private static Sort[] impl=new Sort[]{ LB]3-FsU+
new InsertSort(), N.z2eo
new BubbleSort(), l"dXL"h
new SelectionSort(), c\rP -"C
new ShellSort(), ,@;|+C
new QuickSort(), 4<UAT|L^`
new ImprovedQuickSort(), qCrpc=
new MergeSort(), &53,8r
new ImprovedMergeSort(), $#5'c+0
new HeapSort() aL&egM*
}; vO9=CCxvq
Y0lLO0'
public static String toString(int algorithm){ 4V,p\$;
return name[algorithm-1]; }qp)VF
} H6K8.
6g#yzex
public static void sort(int[] data, int algorithm) { hV,T889'
impl[algorithm-1].sort(data); 'JdK0w#
} rWNe&gFM
L#a!fd
public static interface Sort { )O+Zbn
public void sort(int[] data); R8lja%+0$
} ZoJqJWsd
%$o[,13=
public static void swap(int[] data, int i, int j) { = )3\B
int temp = data; #U%HGTE0
data = data[j]; .kuNn-$
data[j] = temp; ALF21e*n
} k.54lNl
} U%@C<o "