[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={q1
} _H]\
int i1=l; @T1G#[C~t
int i2=mid+1; kG^76dAQL
for(int cur=l;cur<=r;cur++){ ':4cQ4Z
if(i1==mid+1) ucCf%T\:
data[cur]=temp[i2++]; ];bRRBEU
else if(i2>r) mh+T!v$[n)
data[cur]=temp[i1++]; ew;;e|24
else if(temp[i1] data[cur]=temp[i1++]; 4&)sROjV=
else #qRoTtMq7
data[cur]=temp[i2++]; _[:6.oNjIe
} g)Z8WH$;H3
} q(sTKT[V
i4D(8;
} bpu`'Vx
Iu'9yb
改进后的归并排序: <,vIN,Kl8/
f-U zFlU
package org.rut.util.algorithm.support; kBUkE-~
!Vpi1N\
import org.rut.util.algorithm.SortUtil; )k<cd.MX
U1`5P!ov
/** J"gMm@#C4
* @author treeroot D]]e6gF$e
* @since 2006-2-2 zCs34=3D[
* @version 1.0 HcRw9,I'
*/ dCx63rF`G
public class ImprovedMergeSort implements SortUtil.Sort { uYW4$6S3
>`QBN1 Y
private static final int THRESHOLD = 10; ,GOIg|51
rFzNdiY
/* W]4Z4&
* (non-Javadoc) zDFNx:h
* GrF4*I`q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >`UqS`YQK
*/ E2r5Pg
public void sort(int[] data) { ]|g2V a~-
int[] temp=new int[data.length]; n{!{,s
mergeSort(data,temp,0,data.length-1); 39 }e }W"
} ,;}
?h4[yp=w
private void mergeSort(int[] data, int[] temp, int l, int r) { %cn1d>M+I
int i, j, k; 6"G(Iq'2t3
int mid = (l + r) / 2; "L]v:lg3
if (l == r) ]Ik~TW&
return; }&=l)\e
if ((mid - l) >= THRESHOLD) OU%"dmSDk
mergeSort(data, temp, l, mid); g/.FJ-I*
else M}o.= Iqa
insertSort(data, l, mid - l + 1); zNX=V!$
if ((r - mid) > THRESHOLD) S|tA%2z
mergeSort(data, temp, mid + 1, r); k*;U?C!
else 5%2~/ "
insertSort(data, mid + 1, r - mid); 'S6zkwC]
EM@|^47$
for (i = l; i <= mid; i++) { 0bh 6ay4
temp = data; Z0Sqw
} Z~Q5<A9Jz
for (j = 1; j <= r - mid; j++) { 1R8tR#l
temp[r - j + 1] = data[j + mid]; !O"2)RU1
} []@@
int a = temp[l]; y`zdI_!7
int b = temp[r]; u W,J5!
for (i = l, j = r, k = l; k <= r; k++) { C'[4jz0xF
if (a < b) { {2q"9Ox"
data[k] = temp[i++]; [!%5(Ro_
a = temp; t`Bk2Cc)+
} else { } 9zi5o8
data[k] = temp[j--]; o=Z:0Ukl]
b = temp[j]; u_WUJ_
} E|;>!MMA;
} S*G^U1Sc+
} E|9`J00
=)+^y}xb
/** gH(#<f@ZI
* @param data #9(+)~irz`
* @param l {D8opepO)
* @param i |Jx:#OM
*/ ltNI+G
private void insertSort(int[] data, int start, int len) { v+x<X5u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z{3`nd,
} h$`m0-'
} I@m(}
} G_=i#Tu[
} c=tbl|Cq
}5PC53q
堆排序： 'yH
&V+_b$
package org.rut.util.algorithm.support; $&.(7F^D
n#"G)+h3#
import org.rut.util.algorithm.SortUtil; [@qjy*5p
$A~aNI
/** ILDO/>n
* @author treeroot &V axv$v}
* @since 2006-2-2 !j7mY9x+
* @version 1.0 AB%i|t
*/ " l|`LjP5M
public class HeapSort implements SortUtil.Sort{ [H\0 '
pSQX
/* (non-Javadoc) -l}"DP _
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S}Wj.l+F
*/ tOVTHx3E]
public void sort(int[] data) { ^(
MaxHeap h=new MaxHeap(); `%[m%Y9h
h.init(data); c86?-u')
for(int i=0;i h.remove(); }f;TG:6
System.arraycopy(h.queue,1,data,0,data.length); /Zs_G=\>
} &zgliT!If
TXYO{
private static class MaxHeap{ z4D)Xy"/
'J*'{
void init(int[] data){ +(x(Ybl#
this.queue=new int[data.length+1]; \h[*oeh
for(int i=0;i queue[++size]=data; RU/WI<O
fixUp(size); U= GJuixy
} =W')jKe0
} t|V5[n!
j8Q_s/n
private int size=0; ^vh!1"T
PSAEW.L
private int[] queue; :KC]1_zqR
x Y$x=)
public int get() { 5hEA/G
return queue[1]; ,^ ,R .T
} m~=VUhPd
B7qi|Fw
public void remove() { 1Bs t|
SortUtil.swap(queue,1,size--); *lZ V3F
fixDown(1); rgXX,+cO
} q}jh>`d
file://fixdown xC +>R1)
private void fixDown(int k) { ])qnPoQ<n
int j; IX 6 jb"
while ((j = k << 1) <= size) { }Uj-R3]}K
if (j < size %26amp;%26amp; queue[j] j++; CEkf0%YJ
if (queue[k]>queue[j]) file://不用交换 p);[;S
break; d\Up6F
SortUtil.swap(queue,j,k); jK\kASwG
k = j; )]w&DNc
} a%m>v,
} ]7,0>
private void fixUp(int k) { 0;1O;JRw
while (k > 1) { g}6M+QNj
int j = k >> 1; |2TH[J_a
if (queue[j]>queue[k]) j."V>p8u$
break; &N7q9t
SortUtil.swap(queue,j,k); Zd)LVc[
k = j; ,*V%
} 4j+M<g
} ?gAwMP(>
=v|$dDz
} +5O^{Ce6
$pPc}M[h
} 6C"${}SF`
jN= !Q&^i[
SortUtil： {LKW%G7
evE:FiDm(j
package org.rut.util.algorithm; r;(^]Soz
OJydt;a
import org.rut.util.algorithm.support.BubbleSort; o6x8jz
import org.rut.util.algorithm.support.HeapSort; &sn-;r
import org.rut.util.algorithm.support.ImprovedMergeSort; YJwI@E(l$
import org.rut.util.algorithm.support.ImprovedQuickSort; .j)DE}[q>
import org.rut.util.algorithm.support.InsertSort; Ao\OU}
import org.rut.util.algorithm.support.MergeSort; 2b\h@VJt
import org.rut.util.algorithm.support.QuickSort; ,3GB9
import org.rut.util.algorithm.support.SelectionSort; oKkDG|IE
import org.rut.util.algorithm.support.ShellSort; wE9z@\z]
R'_F9\
/** m/g[9Y
* @author treeroot mm!JNb9(
* @since 2006-2-2 NU.4_cixb
* @version 1.0 ,{ 0&NX
*/ 3# 0Nd"/0
public class SortUtil { P_Gu~B!Y
public final static int INSERT = 1; /&=y_%VR
public final static int BUBBLE = 2; {O=_c|u{N
public final static int SELECTION = 3; hE\gXb
public final static int SHELL = 4; |P9MhfN
public final static int QUICK = 5; g("[wqgG
public final static int IMPROVED_QUICK = 6; M_$;"NS+}
public final static int MERGE = 7; Xa'b@*o&
public final static int IMPROVED_MERGE = 8; 6m(+X MS
public final static int HEAP = 9; |gk"~D
Lrt~Q:z2u
public static void sort(int[] data) { FgP{
sort(data, IMPROVED_QUICK); P|fh4b4
} r;waT@&C
private static String[] name={ 9,>c;7s X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?56;<%0
}; M@. 2b.
|ns9ziTDI
private static Sort[] impl=new Sort[]{ L?(1 [jB4G
new InsertSort(), HZ{DlH;&
new BubbleSort(), apxq] ! `
new SelectionSort(), vHymSU/J
new ShellSort(), Hnvs{KC`
new QuickSort(), >I/~)B`jhE
new ImprovedQuickSort(), #zn`)n
new MergeSort(), y>J6)F =
new ImprovedMergeSort(), Q^lgtb
new HeapSort() WH+Sd
}; :G<~x8]k0
!*k'3rKOW
public static String toString(int algorithm){ tD,~i"0;
return name[algorithm-1]; V8%( h[
} riglEA[^
FePWr7Ze
public static void sort(int[] data, int algorithm) { RDqQ6(e"
impl[algorithm-1].sort(data); :WSszak
} ]4_)WUS.c
~X) 1!Sr
public static interface Sort { 6,p;8I
public void sort(int[] data); /-ewCCzZV
} Pz'Zn
F n*+uk
public static void swap(int[] data, int i, int j) { =~$)Ieu
int temp = data; U4y ?z
data = data[j]; bXWodOSN
data[j] = temp; 0o?2Sf`L\*
} <3{>;^|e
} #|cr\\2*