[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; IH8^ fyQ`
} M7!>-P
int i1=l; %>B?WR\yE
int i2=mid+1; -02cI}e
for(int cur=l;cur<=r;cur++){ gp'9Pf;\[
if(i1==mid+1) T^.;yU_B?
data[cur]=temp[i2++]; Lsa&A+fru
else if(i2>r) +InAK>NZ'
data[cur]=temp[i1++]; x LR 2H>B}
else if(temp[i1] data[cur]=temp[i1++]; Ex2TV7I
else 7wS)'zR;
data[cur]=temp[i2++]; +M-x*;.
} ZlD\)6 dZ
} C%#=@HC
'lNy&
} ; mnV)8:F
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改进后的归并排序: 17g\XC@ Cl
S^0Po%d
package org.rut.util.algorithm.support; aC:Sy^Tf
5q?2?j/h
import org.rut.util.algorithm.SortUtil; D#|+PG7
))f%3_H
/** %B+W#Q`
* @author treeroot Si#I^aF`%
* @since 2006-2-2 KPO?eeT.WZ
* @version 1.0 ZYDLl8
*/ sUA==k
public class ImprovedMergeSort implements SortUtil.Sort { 9a}rE
<?UbzT7X
private static final int THRESHOLD = 10; 1%~yb Q
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/* +k|t[N
* (non-Javadoc) JW[y
* 5ZeE& vG2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m?cC0(6
*/ c ;_ T
public void sort(int[] data) { z%-Yz-G9
int[] temp=new int[data.length]; N>qOiw[
mergeSort(data,temp,0,data.length-1); a9S0glbwf
} :{@&5KQ8)
|"h# Q[3
private void mergeSort(int[] data, int[] temp, int l, int r) { 0G`_dMN
int i, j, k; Y"~Tf{8
int mid = (l + r) / 2; j9"uxw@
if (l == r) e0iE6:i
return; ( HCB\!g
if ((mid - l) >= THRESHOLD) R~OameRR
mergeSort(data, temp, l, mid); {(;dHF%{
else -4ityS @
insertSort(data, l, mid - l + 1); ^uB9EP*P
if ((r - mid) > THRESHOLD) ?m.WqNBH7
mergeSort(data, temp, mid + 1, r); S9/oBxGN
else G"w ?{W@
insertSort(data, mid + 1, r - mid); 0kxo
"FA&Qm0
for (i = l; i <= mid; i++) { R gY-fc0
temp = data; r}kQ<SRx
} xCU^4DO3p
for (j = 1; j <= r - mid; j++) { q =sEtH=
temp[r - j + 1] = data[j + mid]; K;,zE6WD$$
} a@(4X/|
int a = temp[l]; DM {r<?V
int b = temp[r]; sf{rs*bgp
for (i = l, j = r, k = l; k <= r; k++) { NA%M)u{|
if (a < b) { H",w$$eF
data[k] = temp[i++]; Co[fq3iX#
a = temp; "f^s*I
} else { -*xm<R],
data[k] = temp[j--]; g}>Sc=e<
b = temp[j]; {No*Z'X
} ' >a(|
} { FVLH:{U^
} }diB
n0|oV(0FE
/** \Tf[% Kt x
* @param data ~)>O=nR
* @param l #oBMA
* @param i DUBEh@
*/ ZH'- >/
private void insertSort(int[] data, int start, int len) { ?,GCR1|4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HJ4T! `'d
} ^s*j<fH
} anDwv }
} i-1lppI
} mZGAl1`8
5G5P#<Vv
堆排序： lmmB=F
>6fc`3*!
package org.rut.util.algorithm.support; }:JE*D|
\XDc{c]
import org.rut.util.algorithm.SortUtil; Axb,{X[6g
R9=K/
/** 0\fV'JDOR
* @author treeroot I*,!zym
* @since 2006-2-2 tBR"sBiws
* @version 1.0 V>"nAh]}.
*/ ;. jnRPo";
public class HeapSort implements SortUtil.Sort{ [[uKakp
Bw5zh1ALC;
/* (non-Javadoc) h)S223[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XLwmXi
*/ IE/F =Wr
public void sort(int[] data) { <ezv
MaxHeap h=new MaxHeap(); $|J16tW
h.init(data); tJ:]ne
for(int i=0;i h.remove(); ey'x3s_
System.arraycopy(h.queue,1,data,0,data.length); <cC0l-=
} Djv0]Sm^!
iWCR5c=
private static class MaxHeap{ BS-nny
w[`2t{^j
void init(int[] data){ Po+I!TL'
this.queue=new int[data.length+1]; #<_gY
for(int i=0;i queue[++size]=data; 3&H#LGoV$
fixUp(size); LjZvWts?
} D@jG+k-Lm
} 2hZ>bg
KDx~^OO
private int size=0; j_=A)B?
B 4s^X`?z
private int[] queue; #jY\l&E
9 Vn
public int get() { ZUDdLJ
return queue[1]; Vz=ByyC
} 82w;}(!
lr>:S
public void remove() { Xz/5Wis4
SortUtil.swap(queue,1,size--); z^@.b
fixDown(1); IZr~h9
} [VvTR#^
file://fixdown 7d9kr?3(U
private void fixDown(int k) { &G#LQl
int j; 3Z,J&d`[
while ((j = k << 1) <= size) { +TA'P$j
if (j < size %26amp;%26amp; queue[j] j++; \BIa:}9O
if (queue[k]>queue[j]) file://不用交换 +w'"N
break; !_zp'V]?
SortUtil.swap(queue,j,k); U)v['5%
k = j; G8]DK3#
} j$2rU'
} cJ CKxj
private void fixUp(int k) { +ZuT\P&kR5
while (k > 1) { I+qg'mo
int j = k >> 1; u\L=nCtLby
if (queue[j]>queue[k]) M84{u!>[
break; g43j-[j)
SortUtil.swap(queue,j,k); 5m.{ayE
k = j; N^G $:GC
} +I>u${sVx*
} uc.dtq!
U[4Xo&`
} ll]MBq
KKrLF?rc
} Z%h _g-C
[ " n+2;
SortUtil： +[LG>
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package org.rut.util.algorithm; bn$('
hW^*b:v{
import org.rut.util.algorithm.support.BubbleSort; YY!Lv:.7>
import org.rut.util.algorithm.support.HeapSort; [r[IWy(}
import org.rut.util.algorithm.support.ImprovedMergeSort; .f1
import org.rut.util.algorithm.support.ImprovedQuickSort; }OQaQf9V{
import org.rut.util.algorithm.support.InsertSort; U9?fUS
import org.rut.util.algorithm.support.MergeSort; % oPt],>
import org.rut.util.algorithm.support.QuickSort; 3K8#,TK3
import org.rut.util.algorithm.support.SelectionSort; -?jI{].:8
import org.rut.util.algorithm.support.ShellSort; A*1-2
/G{;?R
/** {B!LhvYAH
* @author treeroot H@+1I?l
* @since 2006-2-2 *En29N#a{
* @version 1.0 >GbCRN~
*/ 3q$[r_
public class SortUtil { &.m.ruab
public final static int INSERT = 1; {;z{U;j
public final static int BUBBLE = 2; JJIlR{WY_
public final static int SELECTION = 3; -<g&U*/E
public final static int SHELL = 4; fX ^hO+f
public final static int QUICK = 5; .Yw
public final static int IMPROVED_QUICK = 6; }9Th`
public final static int MERGE = 7; (D.B'V#>
public final static int IMPROVED_MERGE = 8; :,@"I$>*/
public final static int HEAP = 9; _Q9Mn-&qQ
)bd)noZi
public static void sort(int[] data) { QR ?JN\%?
sort(data, IMPROVED_QUICK); nrhzNW>]
} e_<'zH_1
private static String[] name={ W2$MH: j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O c[F
}; (6y[,lYH
Z[ NO`!<
private static Sort[] impl=new Sort[]{ ;S&PLgZ
new InsertSort(), mp!S<m
new BubbleSort(), .S5%Qa [uW
new SelectionSort(), '-,$@l#
new ShellSort(), p#\JKx
new QuickSort(), #Nv^F
new ImprovedQuickSort(), kFRl+,bi~
new MergeSort(), gwA+%]
new ImprovedMergeSort(), N$!aP/b
new HeapSort() *?JNh;
}; 1Fg*--8[r
A^2n i=b
public static String toString(int algorithm){ 7J[DD5
return name[algorithm-1]; .83{NF
} Cr7T=&L
6YHQ/#'G~
public static void sort(int[] data, int algorithm) { 5 O't-'
impl[algorithm-1].sort(data); $fzO:br5WJ
} rexNsKRK_
[%uj+?}6O
public static interface Sort { ,+d\@:
public void sort(int[] data); PeX^aEc
} H|.cD)&eYy
&'V1p4'
public static void swap(int[] data, int i, int j) { j`D%Wx_
int temp = data; #VvU8"u
data = data[j]; } SNZl`>
data[j] = temp; xg^Z. q)d
} (^G@-eh
} 9hTzi+'S