[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; 2hmV1gj
} "{L%5:H@
int i1=l; AP/5,M<
int i2=mid+1; yy/wSk
for(int cur=l;cur<=r;cur++){ &m+s5
if(i1==mid+1) s?E7tmaM
data[cur]=temp[i2++]; V><5N;w
else if(i2>r) &W`yHQ"JY
data[cur]=temp[i1++]; rJ9a@n,
else if(temp[i1] data[cur]=temp[i1++]; GaM#a[p
else k gWF@"_
data[cur]=temp[i2++]; ;f0+'W
} Wx;9N
} 0gfa7+Y
>9Ub=tZm
} .T4"+FTzP
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改进后的归并排序: n1.]5c3p
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package org.rut.util.algorithm.support; uK}k]x\z
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import org.rut.util.algorithm.SortUtil; ihf5`mk/$
0=L:8&m
/** l"b78n
* @author treeroot IqcPml{\
* @since 2006-2-2 CKNH/[ZR,
* @version 1.0 l)=Rj`M
*/ jo{GPp}
public class ImprovedMergeSort implements SortUtil.Sort { RK"dPr
(#LV*&K%IC
private static final int THRESHOLD = 10; 2$=?;~
}T4"#'`
/* ##1[/D(
* (non-Javadoc) MP;7u%
* Dr,{V6^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QZt/Rm>W0
*/ Bb8lklQ
public void sort(int[] data) { )k <ON~x
int[] temp=new int[data.length]; O'A''}M
mergeSort(data,temp,0,data.length-1); D8BK/E-
} URX>(Y}g9^
'S E%9
private void mergeSort(int[] data, int[] temp, int l, int r) { 1ciP+->$
int i, j, k; w*$nG$
int mid = (l + r) / 2; 8WfF: R;
if (l == r) 5pE[}@-c9
return; T3%yV*F,
if ((mid - l) >= THRESHOLD) ?Z*LTsPr
mergeSort(data, temp, l, mid); 2syKYHV
else Ny p5=
insertSort(data, l, mid - l + 1); ;:8_H0X'K
if ((r - mid) > THRESHOLD) 'hf-)\Ylf
mergeSort(data, temp, mid + 1, r); yi r#G""7
else {C|#<}1
insertSort(data, mid + 1, r - mid); ZMy7z|
zSj.Y{J
for (i = l; i <= mid; i++) { nWmc
temp = data; tjuW+5O
} !$qNugLg
for (j = 1; j <= r - mid; j++) { p,$1%/m
temp[r - j + 1] = data[j + mid]; {cq; SH
} :$dGcX}
int a = temp[l]; E3_EXz9h
int b = temp[r]; j?[fpN$
for (i = l, j = r, k = l; k <= r; k++) { V,*YM
if (a < b) { FzA_-d/_dg
data[k] = temp[i++]; j#3}nJB%#i
a = temp; ^HX={(ddK
} else { >2vl & (
data[k] = temp[j--]; !`)-seTm
b = temp[j]; cC&R~h]|
} DZRkK3
} HiILJyb
} =36vsps=
| z$ba:u5
/** 9%>H}7=
* @param data &}YB!6k h^
* @param l 6./h0kD`
* @param i ShF ][v1L
*/ vA;ml$
private void insertSort(int[] data, int start, int len) { !ck=\3pr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y}(v[QGV
} 6V*@ {
} 4US8B=jk
} V0c*M>V
} 3)EslBA7i
v^HDR 3I
堆排序： ?K|PM<A
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package org.rut.util.algorithm.support; it D%sKo
`i,ZwnLh{
import org.rut.util.algorithm.SortUtil; %4imlP
/vD5C
/** 3Ey#?
* @author treeroot ]cLpLA"
* @since 2006-2-2 Tf21K9+`L
* @version 1.0 )p(5$AR7
*/ \aU^c24>
public class HeapSort implements SortUtil.Sort{ K>,Kbs=D6
Y%anR|
/* (non-Javadoc) `m`jX|`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *x)WF;(]g
*/ M5: f^
public void sort(int[] data) { WK:~2m&y
MaxHeap h=new MaxHeap(); 3@XCP-`
h.init(data); 9kH~+
for(int i=0;i h.remove(); C>:F4"0
System.arraycopy(h.queue,1,data,0,data.length); }8fxCW*|
} N@58R9P<p
`IFt;Ja\6
private static class MaxHeap{ v}+axu/?
:BC0f9
void init(int[] data){ ;7K5Bo
this.queue=new int[data.length+1]; (GMKIw2
for(int i=0;i queue[++size]=data; ~AS2$
fixUp(size); n<"?+bz"<
} J=Ak+J
} B.'@~$
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private int size=0; .hSacd
z%`Tf&UL
private int[] queue; C!Y|k.`p
{{tH$j?Q
public int get() { G>YJ3p7
return queue[1]; DSizr4R
} *;,=x<
os/~6
public void remove() { P@PZm
SortUtil.swap(queue,1,size--); %+Z0$Q
fixDown(1); (+>+@G~o
} C ])Q#!D|
file://fixdown e ! 6SJ7xC
private void fixDown(int k) { F,11 \j
int j; tURIDj%#p
while ((j = k << 1) <= size) { dV<M$+;s]
if (j < size %26amp;%26amp; queue[j] j++; mE}``
if (queue[k]>queue[j]) file://不用交换 wI1[I
break; =c(_$|0
SortUtil.swap(queue,j,k); 4CW/
k = j; U#Wc!QN-t
} uQ vW@Tt
} Gyjx:EM
private void fixUp(int k) { 5l=B,%s
while (k > 1) { pyT+ba#
int j = k >> 1; "SNsOf
if (queue[j]>queue[k]) t TA6 p
break; MPAZ%<gmD
SortUtil.swap(queue,j,k); ?\<2*sW [k
k = j; GH7{_@pv8
} P9B@2#
} 0u,=OvU
PJAE~|a
} f`:e#x
prlB9,3|C
} &M6)-V4
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SortUtil： = EyxM
1_fFbb"
package org.rut.util.algorithm; 9x;/q7
OV7vwj/-
import org.rut.util.algorithm.support.BubbleSort; ^W_}Gd<-#Y
import org.rut.util.algorithm.support.HeapSort; o*qEAy?
import org.rut.util.algorithm.support.ImprovedMergeSort; FT[oM<M\Xd
import org.rut.util.algorithm.support.ImprovedQuickSort; 0s$g[Fw<.
import org.rut.util.algorithm.support.InsertSort; V*=cNj
import org.rut.util.algorithm.support.MergeSort; yD#w@yG
import org.rut.util.algorithm.support.QuickSort; { )'D<:T
import org.rut.util.algorithm.support.SelectionSort; d#ya"e>
import org.rut.util.algorithm.support.ShellSort; 0Y)b319B
F}H!vh[
/** p$?c>lim
* @author treeroot IywovN Tr
* @since 2006-2-2 cQ6[o"j.
* @version 1.0 "*RCV6{
*/ l YH={jJ
public class SortUtil { bjm`u3 A
public final static int INSERT = 1; \#LKsQa
public final static int BUBBLE = 2; ,*E%D_
public final static int SELECTION = 3; J}._v\Q7P
public final static int SHELL = 4; @tEVgyN
public final static int QUICK = 5; E;VBoN [
public final static int IMPROVED_QUICK = 6; ;FMK>%Zq
public final static int MERGE = 7; ZNOoyWYi5
public final static int IMPROVED_MERGE = 8; pr;<n\Y{
public final static int HEAP = 9; 6ynQCD
R:E6E@T
public static void sort(int[] data) { g~FB&U4c
sort(data, IMPROVED_QUICK); u\t[rC=yd
} l]sO[`X
private static String[] name={ I;P?P5H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {)4Vv`n
}; F#X\}MvEU
L9Fx Lw41
private static Sort[] impl=new Sort[]{ "'t<R}t!A
new InsertSort(), u+I-!3J87
new BubbleSort(), {@Diig
new SelectionSort(), :]y;t/
new ShellSort(), Se0/ysVB
new QuickSort(), _N/]&|.. !
new ImprovedQuickSort(), Xuh_bW&zF
new MergeSort(), &Eidc .
new ImprovedMergeSort(), a(x[+ El
new HeapSort() aCGPtA'
}; _9!Ru!u~
Qi=rhN`
public static String toString(int algorithm){ M?[lpH3
return name[algorithm-1]; ^3=8*Xr
} ;2L=WR%
qhK;#<#
public static void sort(int[] data, int algorithm) { EF"ar
impl[algorithm-1].sort(data); T?AGQcG
} Y1`.
( fdDFb#1
public static interface Sort { ;Ic3th%u
public void sort(int[] data); U?$v1||
} 1 _5[5K^
C>T6{$xkC
public static void swap(int[] data, int i, int j) { <>j,Q
int temp = data; *zX<`E
data = data[j]; 'kH#QO\(e"
data[j] = temp; {H])Fob
} PDD` eK}Fj
} D|e6$O5o