[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; b_taC^-l
} `/+>a8
int i1=l; /36:ms A
int i2=mid+1; Dx?,=~W9
for(int cur=l;cur<=r;cur++){ u&vf+6=9Dd
if(i1==mid+1) N>`Aw^ _@&
data[cur]=temp[i2++]; jB2[(
else if(i2>r) WpP}stam/
data[cur]=temp[i1++]; t=iIY`Md%
else if(temp[i1] data[cur]=temp[i1++]; sll\g
else Nai2W<,
data[cur]=temp[i2++]; 5C]x!>kX
} ? OM!+O
} ADzhNfS
PC8Q"O
} q54]1TQ
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改进后的归并排序: JH9J5%sp
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package org.rut.util.algorithm.support; +O{*M9B
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import org.rut.util.algorithm.SortUtil; C,r;VyW6BI
Ld~/u]K%V
/** d7upz]K9g
* @author treeroot TD0 B%
* @since 2006-2-2 8GUX{K
* @version 1.0 #;yZ
*/ r#a=@
public class ImprovedMergeSort implements SortUtil.Sort { x 9fip-
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private static final int THRESHOLD = 10; F;0}x;:>
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/* u.Tcg^v
* (non-Javadoc) ]G< Vg5
* Q%mB|i|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jidwt$1l(
*/ j*TYoH1
public void sort(int[] data) { 6]%sFy2
int[] temp=new int[data.length]; ;&-k#PE]/H
mergeSort(data,temp,0,data.length-1); l u%}h7ng
} >{J(>B\
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private void mergeSort(int[] data, int[] temp, int l, int r) { s 3f-7f<
int i, j, k; (tw)nF
int mid = (l + r) / 2; q0r>2c-d
if (l == r) 3r."j2$Hs0
return; g0Gf6o>2
if ((mid - l) >= THRESHOLD) e5*hE
mergeSort(data, temp, l, mid); =\wxsL
else 0+;bh {Eu
insertSort(data, l, mid - l + 1); E+g@M8D
if ((r - mid) > THRESHOLD) /Uy"M:|V1
mergeSort(data, temp, mid + 1, r); e:n<EnT
else OO*zhGD;[
insertSort(data, mid + 1, r - mid); fnX`Q[b4\A
={d>iByq
for (i = l; i <= mid; i++) { A5R<p+t6
temp = data; ,-d0b0
} MUREiL9L|
for (j = 1; j <= r - mid; j++) { T)TfB(
temp[r - j + 1] = data[j + mid]; +&( Mgbna
} ^!ZC?h!rG
int a = temp[l]; >TnTnFWX
int b = temp[r]; 3|4|*6
for (i = l, j = r, k = l; k <= r; k++) { <vh/4
if (a < b) { e2t-4} ww
data[k] = temp[i++]; ``Dq
a = temp; e .2ib?8
} else { T| V:$D'
data[k] = temp[j--]; A1D^a,
b = temp[j]; }v*G_}^
} y4I6
} Raxrb=7
} ^*8G8'k;$
E2@65b$
/** Ba*,-i3ZK
* @param data luuX2Mx>o
* @param l /VS[pXXT|
* @param i (-xS?8x$
*/ QnXA*6DJ
private void insertSort(int[] data, int start, int len) { E^lvbLh'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z X(z;|l45
} BuWHX>H
} 9S7kUl{
} &7b|4a8B%
} v'qG26
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堆排序： ') gi%
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package org.rut.util.algorithm.support; P8>d6;o($
=aj/,Q]
import org.rut.util.algorithm.SortUtil; feNdMR7eM
pUq1|)g
/** 04'~ta(t
* @author treeroot O<"}|nbmQ[
* @since 2006-2-2 OQT;zqup
* @version 1.0 #u"k~La
*/ wX[8A/JPD
public class HeapSort implements SortUtil.Sort{ MHai%E
x2z;6)
/* (non-Javadoc) 6s\Kt3=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RIE5KCrGB
*/ &)vC;$vD`
public void sort(int[] data) { T ;vF(
MaxHeap h=new MaxHeap(); Nwt" \3
h.init(data); oiyzHx
for(int i=0;i h.remove(); x.zbD8l/9
System.arraycopy(h.queue,1,data,0,data.length); : G`hm{
} \ZhfgE8{%
$m+sNEAa
private static class MaxHeap{ S_v'hlrrT
`|#Qx3n%
void init(int[] data){ ivz>dJ?T
this.queue=new int[data.length+1]; 'd&0Js$^
for(int i=0;i queue[++size]=data; .E&z$N
fixUp(size); <~!Hx+j
} MR,R}B$
} HJ[/|NZU$
3g~^[&|i
private int size=0; hL;8pE8
V$icWu
private int[] queue; VY"9?2?/
v-Fg +
public int get() { MXiQ1x
return queue[1]; ;)I'WQ]Q
} hf<^/@^tK
80Y\|)
public void remove() { "zY](P
SortUtil.swap(queue,1,size--); wwoweztER
fixDown(1); {}m PEd b
} 7Wa?$6d
file://fixdown XfE -fH1j
private void fixDown(int k) { pD2<fP_
int j; c8M2 ^{O,`
while ((j = k << 1) <= size) { #nO|A\N
if (j < size %26amp;%26amp; queue[j] j++; Za7q$7F7Bc
if (queue[k]>queue[j]) file://不用交换 G #T<`>T
break; sv(f;ib
SortUtil.swap(queue,j,k); t"lyvI[
k = j; tpEI(9>
} F3lw@b3])
} R@yyur~'_(
private void fixUp(int k) { ~!d/8?!
while (k > 1) { -l-E_6|/W
int j = k >> 1; 16EVl~LN
if (queue[j]>queue[k]) CBKkBuKuk
break; /.eeOk
SortUtil.swap(queue,j,k); X$\i{p9jw
k = j; C*te^3k>B
} <U9/InN0[
} A[dvEb;r
%F9{EXJy
} u@P[Vb
)|<_cwz
} yag}fQ(XH
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SortUtil： c<BO gNr
LsGiu9~S
package org.rut.util.algorithm; M4LktR-[
uw7{>9
import org.rut.util.algorithm.support.BubbleSort; w_4]xgS:
import org.rut.util.algorithm.support.HeapSort; =}fd6ea(o
import org.rut.util.algorithm.support.ImprovedMergeSort; 6V+ qnUk
import org.rut.util.algorithm.support.ImprovedQuickSort; Ld,5iBiO:
import org.rut.util.algorithm.support.InsertSort; (5Tvsw`
import org.rut.util.algorithm.support.MergeSort; x2#qg>`l
import org.rut.util.algorithm.support.QuickSort; l n}}5Q
import org.rut.util.algorithm.support.SelectionSort; _0 snAt^iC
import org.rut.util.algorithm.support.ShellSort; y8bM<e2 U
Uo_tUp_Q
/** k)FmDX
* @author treeroot jN+N(pIi.o
* @since 2006-2-2 rt+..t\
* @version 1.0 0gF!!m
*/ |__=d+M'
public class SortUtil { w[Ep*-yeI
public final static int INSERT = 1; r\9TMg`C
public final static int BUBBLE = 2; }98>5%Uv
public final static int SELECTION = 3; /WnE:3G
public final static int SHELL = 4; g#K'6VK{
public final static int QUICK = 5; N 6O8Wn
public final static int IMPROVED_QUICK = 6; o8FXqTUcs4
public final static int MERGE = 7; qJT0Y/l:(
public final static int IMPROVED_MERGE = 8; j%*7feSNC
public final static int HEAP = 9; 6a>H|"PNE
%xyX8c{sP
public static void sort(int[] data) { <3O T>E[
sort(data, IMPROVED_QUICK); +MO E
} ^!;=6}YR
private static String[] name={ e}cnX`B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )Z@-DA*Q-
}; ?&h3P8
[~k]{[NJ
private static Sort[] impl=new Sort[]{ yNJAWM7
new InsertSort(), vh>{_ #
new BubbleSort(), bn 4 &O
new SelectionSort(), kJ: 2;t=
new ShellSort(), '3kcD7
new QuickSort(), q:HoKJv4
new ImprovedQuickSort(), $)e:8jS=
new MergeSort(), <3 j~=-
new ImprovedMergeSort(), ~ |,e_ zA
new HeapSort() G\Q9IcJ0dY
}; LEc8NQs
H]qq ~bO[
public static String toString(int algorithm){ s5Fr)q// !
return name[algorithm-1]; ZZ A.a
} j/<??v4F4
`h;}3r#R{
public static void sort(int[] data, int algorithm) { liNON
impl[algorithm-1].sort(data); Plz-7fy33
} + >sci
TIRHT`"i
public static interface Sort { A"/aGCG0z
public void sort(int[] data); U %:c],Fk
} +X!+'>
U \Dca&=
public static void swap(int[] data, int i, int j) { 4IGxI7~27#
int temp = data; 6hbEO-(
data = data[j]; iiwpSGFl]
data[j] = temp; 8SD}nFQ
} ?\yB)Nd y
} owMuT^x?