[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; zNG]v?JAh
} 8k~$_AT>u
int i1=l; =c/jS
int i2=mid+1; 4gD;XNrV
for(int cur=l;cur<=r;cur++){ D/U=zDpiB
if(i1==mid+1) b-!+Q)
data[cur]=temp[i2++]; oW ! Z=;
else if(i2>r) J)o.@+Q}
data[cur]=temp[i1++]; <e&88{jJ
else if(temp[i1] data[cur]=temp[i1++]; qe^d6
else s|HpN
data[cur]=temp[i2++]; U)v){g3w)
} Z2P DT
} Z01BzIsR
K<3,=gL9[
} n1XJuc~
v;6O# ta'
改进后的归并排序: j(xVbUa
<[l0zE5Z8'
package org.rut.util.algorithm.support; r<MW8
E^s<5BC;
import org.rut.util.algorithm.SortUtil; Kx4_`;>
LI~ofCp
/** Th.Mn}1%L
* @author treeroot ;bYS#Bid{V
* @since 2006-2-2 xVnk]:c
* @version 1.0 wn1` 9
*/ o|en"?4
public class ImprovedMergeSort implements SortUtil.Sort { ,vcg%~-
Yq~$pVgf
private static final int THRESHOLD = 10; PP*',D3
`/"*_AKAI
/* Uf,fd
* (non-Javadoc) }+@GgipyO.
* b}APD))*H!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e0Jz|?d=
*/ ztEM>xsk
public void sort(int[] data) { w. c]
int[] temp=new int[data.length]; c3__=$)'kP
mergeSort(data,temp,0,data.length-1); [ !<
} vk><S|[n
b'O>qQ
private void mergeSort(int[] data, int[] temp, int l, int r) { hU|TP3*
int i, j, k; c0U=Hj@@
int mid = (l + r) / 2; K@<%Vc>L(
if (l == r) EEJ OJ<
return; vT=?UTq
if ((mid - l) >= THRESHOLD) KD=W(\
mergeSort(data, temp, l, mid); o"gtWAGH
else 7[I%UP
insertSort(data, l, mid - l + 1); b#[EkI 0@
if ((r - mid) > THRESHOLD) I xk+y?
mergeSort(data, temp, mid + 1, r); Ri<'apl
else X/qLg+X
insertSort(data, mid + 1, r - mid); Yw6^(g8
oMeIXb)z
for (i = l; i <= mid; i++) { $6DA<v^=z
temp = data; 78UE?) X"
} @b3jO
for (j = 1; j <= r - mid; j++) { /^\UB fE
temp[r - j + 1] = data[j + mid]; [XbNZ6
} H"vkp~u]I
int a = temp[l]; 9#MY(Hr
int b = temp[r]; 7 (kC|q\4M
for (i = l, j = r, k = l; k <= r; k++) { }UzRFIcv
if (a < b) { p*C|kEqk
data[k] = temp[i++]; P*:9u>
a = temp; lS96sjJp@
} else { u` L9Pj&v
data[k] = temp[j--]; J ?^R1
b = temp[j]; ] ^s,
} AI,Jy%62/
} \'hZm%S
} J e"~/+
"n%0L4J
/** [BZA1,
* @param data y*<x@i+h
* @param l Me2qOc^Z-
* @param i sLze/D_M*
*/ Kd!.sB/%
private void insertSort(int[] data, int start, int len) { LQz6op}R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^-2|T__
} R5& R~1N
} U["-`:>jfp
} z)F<{]%
} 73kU\ux
bnZ~jOHl
堆排序： 7'zXf)!
9$*O^
package org.rut.util.algorithm.support; 6%a:^f]
D^)?*(
import org.rut.util.algorithm.SortUtil; Ku`u%5<
f)19sjAJk
/** u:w
* @author treeroot +x]3 -s
* @since 2006-2-2 Xrr3KQaK&
* @version 1.0 0Zh]n;S3m
*/ u"gtv
public class HeapSort implements SortUtil.Sort{ 4A)@,t9+
$5\+QW
/* (non-Javadoc) *!MMl]gU?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N;S1s0FN
*/ m[DCA\Mo@
public void sort(int[] data) { !:wA\mAd
MaxHeap h=new MaxHeap(); *2>kic aH
h.init(data); BcxALRWE
for(int i=0;i h.remove(); ib-H jJ8
System.arraycopy(h.queue,1,data,0,data.length); * zt?y
} A/!"+Yfw
Ctx`b[&KXX
private static class MaxHeap{ > JV$EY,
Tfp^h~&u
void init(int[] data){ `8/D$
this.queue=new int[data.length+1]; u*$]Bx
for(int i=0;i queue[++size]=data; .$]-::&
fixUp(size); 2EiE5@
} +Ze;BKZ3
} t76B0L{
s63!]LDr
private int size=0; <,*3Av
,lcSJ^yr
private int[] queue; IictX"3lh
s#H_QOE
public int get() { .Ta(v3om%
return queue[1]; rXR!jZ.hi
} \V#fl
^^B~v<uK
public void remove() { &B\ sG=
SortUtil.swap(queue,1,size--); GfV#^qi
fixDown(1); {fJCj152.
} E[cH/Rm
file://fixdown "7Z-ACyF5
private void fixDown(int k) { :$*@S=8O
int j; :(iBLO<x
while ((j = k << 1) <= size) { 2ck0k,WP
if (j < size %26amp;%26amp; queue[j] j++; 20# V?hX3
if (queue[k]>queue[j]) file://不用交换 55FRPNx-x
break; SBI*[
SortUtil.swap(queue,j,k); x\oSD1t,
k = j; [RF6mWQ
} wjfq"7Q
} Iz[ohn!f
private void fixUp(int k) { 1obajN
while (k > 1) { U C_$5~8p
int j = k >> 1; A*g-pJh
if (queue[j]>queue[k]) L{rd',
break; &M:o(T
SortUtil.swap(queue,j,k); )<lQJ#L86a
k = j; 9Dbbk/j|
} m%=*3gH]&
} gD2P)7:
s(KSN/
} N=\weuED
%>$Puy\U
} A$i^/hJs
9F[_xe@
SortUtil： Sy']fGvx
[r!f&R
package org.rut.util.algorithm; Mi;Pv*
u-_1)'
import org.rut.util.algorithm.support.BubbleSort; SgYMPBh
import org.rut.util.algorithm.support.HeapSort; '4SDAa2f
import org.rut.util.algorithm.support.ImprovedMergeSort; `ZbFky{
import org.rut.util.algorithm.support.ImprovedQuickSort; lu8*+.V
import org.rut.util.algorithm.support.InsertSort; S@g(kIo]
import org.rut.util.algorithm.support.MergeSort; 91]sO%3
import org.rut.util.algorithm.support.QuickSort; G{I),Y~IF
import org.rut.util.algorithm.support.SelectionSort; )_1 GPS
import org.rut.util.algorithm.support.ShellSort; g+5c"Yk+u~
e,&#,O
/** !JyY&D~`
* @author treeroot 8NiR3*1
* @since 2006-2-2 u`&lTJgF/O
* @version 1.0 {VKFw=$8
*/ * k<@
public class SortUtil { !LzA
public final static int INSERT = 1; b+|3nc!
public final static int BUBBLE = 2; +<j7^AEG
public final static int SELECTION = 3; 0|J_'-<
public final static int SHELL = 4; 7YR|6{@
public final static int QUICK = 5; '&'m#H*:
public final static int IMPROVED_QUICK = 6; g`%in
public final static int MERGE = 7; JhfVm*,
public final static int IMPROVED_MERGE = 8; ?C#E_
public final static int HEAP = 9; a&V;^ /
Yj#tF}nPC
public static void sort(int[] data) { 993f6
sort(data, IMPROVED_QUICK); #{PwEX !Ct
} 5nUJ9sqA
private static String[] name={ 8AX_y3$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" __2<v?\
}; |1RVm?~i
%IX)+ Lp`
private static Sort[] impl=new Sort[]{ BBRL_6
new InsertSort(), BMy3tyO
new BubbleSort(), Vv45w#w;
new SelectionSort(), mL=d EQ
new ShellSort(), FO5a<6
new QuickSort(), }Nsdk',}
new ImprovedQuickSort(), b:D92pH
new MergeSort(), j/z=<jA
new ImprovedMergeSort(), B*,)@h
new HeapSort() _ i}W1i
}; 1^4:l!0D
viG,z4Zf
public static String toString(int algorithm){ /\c'kMAW!
return name[algorithm-1]; kIVQ2hmv
} {]< G=]'
jYFJk&c
public static void sort(int[] data, int algorithm) { M'PZ{6;
impl[algorithm-1].sort(data); U}RBgPX!
} m{/( 3
ch8a
public static interface Sort { eF,F<IJT{
public void sort(int[] data); N)H "'#-
} [b:&y(
ZpV]X(Px(o
public static void swap(int[] data, int i, int j) { -GAF>
int temp = data; cm(*F0<
data = data[j]; n^Ca?|} ,
data[j] = temp; ?vFy3
} dRX~eIw
} u]P|