[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; PPmZ[N9(;
} n'R 8nn6^
int i1=l; V6Q[Y>84~a
int i2=mid+1; ~fS#)X3 D
for(int cur=l;cur<=r;cur++){ d2 d^XMe!
if(i1==mid+1) "7gHn0e>
data[cur]=temp[i2++]; mWigy`V^~
else if(i2>r) .2u%;)S
data[cur]=temp[i1++]; QXF>xZ~
else if(temp[i1] data[cur]=temp[i1++]; N($j;<Q
else ,;{mH]"s
data[cur]=temp[i2++]; zZA I"\;W
} @@! R Iq!
} 45_zO#
HM<V$ R
} bbnAF*7s8
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改进后的归并排序: yyZjMnuD
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package org.rut.util.algorithm.support; 4S9AXE6
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import org.rut.util.algorithm.SortUtil; w%L0mH2]ng
m>a6,#I
/** 5#iv[c
* @author treeroot 2sf/^XC1
* @since 2006-2-2 Ib!`ChZ
* @version 1.0 !.F`8OD`u
*/ (D))?jnC
public class ImprovedMergeSort implements SortUtil.Sort { AJq'~fC;I
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private static final int THRESHOLD = 10; ofN|%g /
##FN0|e&
/* Z|3l2ucl
* (non-Javadoc) ;B tRDKn
* }G-qOt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9}5Q5OZ
*/ vL-%"*>v
public void sort(int[] data) { gBresHrlH
int[] temp=new int[data.length]; <6Br]a60RR
mergeSort(data,temp,0,data.length-1); 8)sqj=
} ww[STg
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private void mergeSort(int[] data, int[] temp, int l, int r) { pJK puoiX
int i, j, k; x]Q+M2g?
int mid = (l + r) / 2; b>&kL
if (l == r) FV!
return; \ bd? `."
if ((mid - l) >= THRESHOLD) _+.z2} M
mergeSort(data, temp, l, mid); D@7\Fg
else yrE|cH'f0
insertSort(data, l, mid - l + 1); )I$_wB!UV
if ((r - mid) > THRESHOLD) JG0TbM1(Bt
mergeSort(data, temp, mid + 1, r); po\QMe
else cQS}pQyYN
insertSort(data, mid + 1, r - mid); UTHGjE
V)_mo/D!D
for (i = l; i <= mid; i++) { *~:4&$
temp = data; {*yhiE,
} 9iUkvnphh
for (j = 1; j <= r - mid; j++) { qwiM.b5
temp[r - j + 1] = data[j + mid]; *:_xy{m\
} & i)p^AmM
int a = temp[l]; Cp_"PvTmT
int b = temp[r]; V:2|l!l*
for (i = l, j = r, k = l; k <= r; k++) { q#c\
if (a < b) { +f;z{)%B
data[k] = temp[i++]; *-ZJF6
a = temp; !H~G_?Mf\O
} else { Q~te`
data[k] = temp[j--]; h8$lDFo
b = temp[j]; \b{=&B[Q$'
} Pdrz lu
} \;$j "i&
} !!DHfAV]
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/** ]geO%m
* @param data ^W3xw[{
* @param l oju4.1
* @param i P0 hC4Sxf
*/ 7:9WiN5b
private void insertSort(int[] data, int start, int len) { "qMd%RP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7o'kdYJzo
} G0xk @SE
} FgKDk!ci
} p/4GOU5g
} u2@:[:Ao
+p>tO\mo
堆排序： @0-<|,^]
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package org.rut.util.algorithm.support; ]M-j_("&
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import org.rut.util.algorithm.SortUtil; NIQNzq?a^
bTb|@
/** 8! pfy"
* @author treeroot j@&F[r
* @since 2006-2-2 D}&U3?g=
* @version 1.0 tb"UGa
*/ v`*!Bhc-
public class HeapSort implements SortUtil.Sort{ "b|qyT* Sl
= 0Z}s
/* (non-Javadoc) ./rNq!*a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yAW%y
*/ <x53b/ft
public void sort(int[] data) { [?.k8;k
MaxHeap h=new MaxHeap(); EO:i+e]=
h.init(data); |z-A;uL<
for(int i=0;i h.remove(); OU/PB
System.arraycopy(h.queue,1,data,0,data.length); diaLw
} :BNqr[=b
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private static class MaxHeap{ ZZX|MA!
1<Qb"FN!2
void init(int[] data){ [59_n{S 1
this.queue=new int[data.length+1]; 5)AMl)
for(int i=0;i queue[++size]=data; &Plc
fixUp(size); [yW0U:m
} xbvZ7g^
} ?FA} ;?v
#JWW ;M6F
private int size=0; Nw/4z$].J
=NQDxt}
private int[] queue; Cevl#c5p>
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public int get() { F$^RM3
return queue[1]; es6!p 7p?
} }[ld=9p(
{M)Y6\v
public void remove() { sV%<U-X
SortUtil.swap(queue,1,size--); 7:)=
fixDown(1); u$X[=
} to|O]h2*U2
file://fixdown Vof[yL `
private void fixDown(int k) { v1oq[+
int j; si.ZTG9m
while ((j = k << 1) <= size) { iT227v!s
if (j < size %26amp;%26amp; queue[j] j++; RplLU7
if (queue[k]>queue[j]) file://不用交换 .!/DM-C
break; -B*= V
SortUtil.swap(queue,j,k); 8Mf6*G#Y
k = j; 8LB,8*L^
} J NPEyC
} onI%Jl sq
private void fixUp(int k) { iV58 m
while (k > 1) { ; $i{>mDT
int j = k >> 1; zogw1g&C
if (queue[j]>queue[k]) hs!a'E
break; &5h{XSv
SortUtil.swap(queue,j,k); o:W>7~$jr=
k = j; Ej~vp2
} c>6dlWTqX
} G3 rTzMO
YC8wo1;Y!
} J<'[P$D
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} z"Miy
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SortUtil： 1hp`.!3]H
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package org.rut.util.algorithm; :PE{2*
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import org.rut.util.algorithm.support.BubbleSort; Tty_P,
import org.rut.util.algorithm.support.HeapSort; o$;t
import org.rut.util.algorithm.support.ImprovedMergeSort; #^4p(eZ[}
import org.rut.util.algorithm.support.ImprovedQuickSort; _kg<KD=P
import org.rut.util.algorithm.support.InsertSort; %UT5KYd!=N
import org.rut.util.algorithm.support.MergeSort; @a$_F3W
import org.rut.util.algorithm.support.QuickSort; -K eoq
import org.rut.util.algorithm.support.SelectionSort; z6)b XL[f
import org.rut.util.algorithm.support.ShellSort; *:gx1wd
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/** rofj&{w
* @author treeroot `u$ Rd
* @since 2006-2-2 H=RzY-\a%
* @version 1.0 >'ev_eAk
*/ b+Vfi9<
public class SortUtil { JZI)jIh
public final static int INSERT = 1; 2[ = =
public final static int BUBBLE = 2; <:/Lap#D^
public final static int SELECTION = 3; p!B&&)&db
public final static int SHELL = 4; v3PtiKS
public final static int QUICK = 5; BbsgZ4
public final static int IMPROVED_QUICK = 6; 55q!2>Jh.
public final static int MERGE = 7; Q]$gw,H"6
public final static int IMPROVED_MERGE = 8; v3O+ ;4
public final static int HEAP = 9; 7^)8DwAl
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public static void sort(int[] data) { 8?LsV<
sort(data, IMPROVED_QUICK); >M~1{
} )Q= EmZbJz
private static String[] name={ [$M=+YRHMW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7+ +Fak
}; -Pt.
\]<eLw-v
private static Sort[] impl=new Sort[]{ *U>"_h T0
new InsertSort(), mv] .
new BubbleSort(), -UY5T@as
new SelectionSort(), : N9,/-s
new ShellSort(), E+z),"QA
new QuickSort(), + OKk~GYf
new ImprovedQuickSort(), k;/K']4y
new MergeSort(), TWE>"8]
new ImprovedMergeSort(), 2iM]t&^<+
new HeapSort() dhrh "x_?:
}; b3.
[l44,!Z&
public static String toString(int algorithm){ E$SYXe[,
return name[algorithm-1]; 2_T2?weD5
} Ig&H0S
|"}oGL6-
public static void sort(int[] data, int algorithm) { Ey|{yUmU+
impl[algorithm-1].sort(data); &3gC&b^i
} CWT#1L=
]2E#P.-!b
public static interface Sort { mR,w~wP
public void sort(int[] data); {E=BFs
} $, hHR:
zUuOX5-6x
public static void swap(int[] data, int i, int j) { gGZ-B<
int temp = data; 5 EhOvt8
data = data[j]; FEY_(70
data[j] = temp; 7N:3
} TOT#l6yqdd
} M( w'TE@