[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; CdgZq\
} 1OK,r`
int i1=l; <DP_`[+C
int i2=mid+1; #Mw|h^Wm
for(int cur=l;cur<=r;cur++){ {j@ S<PD
if(i1==mid+1) _" W<>
data[cur]=temp[i2++]; 8-5MGh0L
else if(i2>r) NH$%g\GPs
data[cur]=temp[i1++]; r,X5@/
else if(temp[i1] data[cur]=temp[i1++]; (M5w:qbR
else #\KSv Z
data[cur]=temp[i2++]; Q*}#?g
} P1)f-:;
} W#87T_7T[
U.is:&]E
} y}*rRm.:
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改进后的归并排序: Ex9%i9H
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package org.rut.util.algorithm.support; /=I&-gxC
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import org.rut.util.algorithm.SortUtil; L9nv05B
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/** &54fFyJF
* @author treeroot w|:UTJ>@
* @since 2006-2-2 ..6 : _{wg
* @version 1.0 rq?:I:0
*/ Qg;A (\z
public class ImprovedMergeSort implements SortUtil.Sort { O^ZOc0<
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private static final int THRESHOLD = 10; Ac;rMwXk#
qOYCQ
/* rStfluPL
* (non-Javadoc) l[lUmE
* yPrp:%PS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,g2|8>sJP
*/ Z3?,r[
public void sort(int[] data) { V{@ xhW0
int[] temp=new int[data.length]; Z_Jprp{3h
mergeSort(data,temp,0,data.length-1); =xcA4"k
} "@U9'rKx
z1[2.&9D-
private void mergeSort(int[] data, int[] temp, int l, int r) { fmZ5rmw!
int i, j, k; \U;4\
int mid = (l + r) / 2; 1| "s_m>g
if (l == r) 7^,C=2
return; Ci6yH( RE
if ((mid - l) >= THRESHOLD) HPl!r0 h
mergeSort(data, temp, l, mid); WqP>cl2Lm
else Y)^qF)v,d
insertSort(data, l, mid - l + 1); Jv1igA21_h
if ((r - mid) > THRESHOLD) ?Q1(L$-=
mergeSort(data, temp, mid + 1, r); g.OBh_j-v
else ^{&Vv(~!Q
insertSort(data, mid + 1, r - mid); H?98^y7
{Ts@#V=:
for (i = l; i <= mid; i++) { S!Ue+jW
temp = data; {|?OKCG{
} ~l"70\&
for (j = 1; j <= r - mid; j++) { Cc*"cQe
temp[r - j + 1] = data[j + mid]; U">J$M@
} a7'.*H]
int a = temp[l]; ` W$
int b = temp[r]; $O"S*)9
for (i = l, j = r, k = l; k <= r; k++) { $G/h-6+8
if (a < b) { "+3p??h%Rq
data[k] = temp[i++]; YVt#( jl
a = temp; @s!9T
} else { p'UYHt
data[k] = temp[j--]; ]:`q/iS&
b = temp[j]; :q=u+h_
} 02E-|p;
} "&?F6Pi
} l'=H,8LfA
, f9V`Pz)
/** *O-1zIlp
* @param data bOjvrg;Sz\
* @param l qS<a5`EA
* @param i UwOZBF<
*/ .,zrr&Po
private void insertSort(int[] data, int start, int len) { yoa"21E$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xLX<.z!r
} 58\rl G
} v#*9rNEj0
} WNSf$D{p
} ETvn$ Jdp
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堆排序： RM\it"g
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package org.rut.util.algorithm.support; 4cJ7W_ >i6
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import org.rut.util.algorithm.SortUtil; ?B ;+,
G)5w_^&%
/** ZN>oz@jY
* @author treeroot GJz d4kj
* @since 2006-2-2 Z$!>hiz2
* @version 1.0 B:S/ ?v
*/ BwtjTwd
public class HeapSort implements SortUtil.Sort{ ucP}( $
&LM@_P"T
/* (non-Javadoc) r&sm&4)p-5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WLGk
*/ rX*4$d0
public void sort(int[] data) { g a|RW0
MaxHeap h=new MaxHeap(); 3YT>3f!\
h.init(data); 'o=`1I
for(int i=0;i h.remove(); ;u`zZb=,[
System.arraycopy(h.queue,1,data,0,data.length); S^nshQI
} 8CKN^8E
,grdl|Dg
private static class MaxHeap{ `^HAWo;J
55xaZ#|
void init(int[] data){ 4i0~t~vDpr
this.queue=new int[data.length+1]; ,'[L6=#
for(int i=0;i queue[++size]=data; |uo<<-\jTO
fixUp(size); )]x/MC:9r
} y ,][
} #xL^S9P
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private int size=0; 2eErvfC[
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private int[] queue; w@&g9e6E
ph\KTLU
public int get() { 0>hV?A
return queue[1]; F FHk0!3
} $s$j</.q
h+EG) <
public void remove() { dqwCyYC
SortUtil.swap(queue,1,size--); *L_+rJj,
fixDown(1); Pd-0u>k
} 1F?`.~q
file://fixdown L=Cm0q 3v
private void fixDown(int k) { A0{ !m
int j; Cv7FVl-I
while ((j = k << 1) <= size) { 0}:- t^P
if (j < size %26amp;%26amp; queue[j] j++; ;Zfglid
if (queue[k]>queue[j]) file://不用交换 4+&4
break; Q/[|/uNw?
SortUtil.swap(queue,j,k); 5J!ncLNm{
k = j; 3[8F:I0UL
} |"V]$s$ c
} s5{N+O)~S
private void fixUp(int k) { Fw,'a
while (k > 1) { i'Vrx(y3
int j = k >> 1; lGHU{7j\
if (queue[j]>queue[k]) yt,xA;g
break; Brw-"tmx
SortUtil.swap(queue,j,k); lq0@)'D
k = j; Y rq-(
} ul[edp_
} U$CAA5HV]
7/*Q?ic
} cRYnQ{$'
CBaU$`5
} ^rF{%1DT
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SortUtil： MbY?4i00%h
AgKG>%0
package org.rut.util.algorithm; JMp>)*YS
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import org.rut.util.algorithm.support.BubbleSort; 5 9$B z'LY
import org.rut.util.algorithm.support.HeapSort; #H9J/k_
import org.rut.util.algorithm.support.ImprovedMergeSort; ;-SFK+)R"
import org.rut.util.algorithm.support.ImprovedQuickSort; vrVb/hhG
import org.rut.util.algorithm.support.InsertSort; tbz?th\#
import org.rut.util.algorithm.support.MergeSort; OsS5WY0H
import org.rut.util.algorithm.support.QuickSort; j2GO ZKy
import org.rut.util.algorithm.support.SelectionSort; J:6wFmU
import org.rut.util.algorithm.support.ShellSort; bb<qnB
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/** ,S"a ,}8
* @author treeroot PF$K> d
* @since 2006-2-2 ;O7CahdF
* @version 1.0 EPx_xX
*/ qRXQL"Pe_l
public class SortUtil { l :sZ
public final static int INSERT = 1; Z}#,E;
public final static int BUBBLE = 2; Q-<,+[/
public final static int SELECTION = 3; s)_Xj`Q#
public final static int SHELL = 4; V}?d ,.m`{
public final static int QUICK = 5; )$18a
public final static int IMPROVED_QUICK = 6; >T'=4n['
public final static int MERGE = 7; *>otz5]
public final static int IMPROVED_MERGE = 8; xw?Mc{w
public final static int HEAP = 9; __x2xtrH
q,b6).
public static void sort(int[] data) { dWR0tS6vR`
sort(data, IMPROVED_QUICK); ,E&PIbDL1
} P'Q|0lB
private static String[] name={ S $wx>715
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N>,`l
}; QWt?` h=
:U^!N8i"=
private static Sort[] impl=new Sort[]{ Y\e,#y
new InsertSort(), ]Z/<HP$#
new BubbleSort(), z#qlu=
new SelectionSort(), \i Ylh HD
new ShellSort(), M%dJqwH5{
new QuickSort(), B>kx$_~
new ImprovedQuickSort(), =,Yi" E
new MergeSort(), Pba 6Ay6B
new ImprovedMergeSort(), 4F_*,_Y
new HeapSort() /I[?TsXp
}; g\sW2qXEw
|&JCf=
public static String toString(int algorithm){ 88fH!6b
return name[algorithm-1]; Az+}[t
} INca
;6op|O
public static void sort(int[] data, int algorithm) { &\(p<TF
impl[algorithm-1].sort(data); W/*2I3a
} ,TrrqCw>
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public static interface Sort { $umh&z/
public void sort(int[] data); WfbG }%&J
} Y02 cX@K6
SKTf=rY
public static void swap(int[] data, int i, int j) { 5<o8prtB
int temp = data; j$l[OZ:#
data = data[j]; /S29\^
data[j] = temp; Uj!3H]d
} fhx_v^<X
} HKA7|z9{