[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; lH#u
} GO8GJ;B-U
int i1=l; $AfM>+GQ`n
int i2=mid+1; yXz*5W_0D
for(int cur=l;cur<=r;cur++){ P=7zs;k
if(i1==mid+1) @$lG@I,[
data[cur]=temp[i2++]; ?>hPO73{
else if(i2>r) ~kShq%
data[cur]=temp[i1++]; "*m_> IU
else if(temp[i1] data[cur]=temp[i1++]; 6;u$&&c(
else 3 N.~mR
data[cur]=temp[i2++]; fhar&\;S
} >Nvjl~o5
} s1=X>'q
:QpuO1Gu
} [p{#XwN
s8wmCzB~
改进后的归并排序: 61.Brp.eP
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package org.rut.util.algorithm.support; xgbJ2Mh
^=T$&gD
import org.rut.util.algorithm.SortUtil; 9)}[7Mg:C
pi /g H
/** lV`Q{bd+
* @author treeroot H(bs$C4F
* @since 2006-2-2 F5?m6`g?
* @version 1.0 p!>oo1&
*/ vtw6FX_B
public class ImprovedMergeSort implements SortUtil.Sort { =G]1LTI
?kWC}k{
private static final int THRESHOLD = 10; |?rNy=P,
+g` 'J$
/* BbW^Wxd3
* (non-Javadoc) @{YS}&Q/
* hn^<;av=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sp#p8@Cj
*/ e}Cif2#d~
public void sort(int[] data) { >ZPsjQuf"
int[] temp=new int[data.length]; 9S-Z&2L
mergeSort(data,temp,0,data.length-1); PUF/#ck
} _&N2'hG=sn
/`f^Y>4gD
private void mergeSort(int[] data, int[] temp, int l, int r) { B-.gI4xa
int i, j, k; AmaT0tzJC
int mid = (l + r) / 2; M:-.o
if (l == r) |zR8rqBX;
return; @W vatD V
if ((mid - l) >= THRESHOLD) >=RmGS
mergeSort(data, temp, l, mid); gg[WlRQK4A
else 9;_sC
insertSort(data, l, mid - l + 1); 1nQWW9i
if ((r - mid) > THRESHOLD) \Kl+ 5%L
mergeSort(data, temp, mid + 1, r); %ZNI:Uh
else XM1WfjE\
insertSort(data, mid + 1, r - mid); 2@9Tfm(=
dls ss\c^M
for (i = l; i <= mid; i++) { LO <
temp = data; zhpx"{_
} *RXbc~ H
for (j = 1; j <= r - mid; j++) { L!rw[x
temp[r - j + 1] = data[j + mid]; L{hnU7sY
} VTG9$rQZ
int a = temp[l]; n;(\5{a
int b = temp[r]; ]F;f`o
for (i = l, j = r, k = l; k <= r; k++) { k *Q<3@S
if (a < b) { YQ39A_e g
data[k] = temp[i++]; zN!ZyI$nqP
a = temp; Q,p}:e
} else { Db)?i?o}t
data[k] = temp[j--]; Kz>3 ic$I
b = temp[j]; gUxP>hB
} oX0D
} >}!mQpAO
} :X.b}^Z(
+VCGlr
/** )#.<]&P}
* @param data CACTE
* @param l Cg&e(
* @param i hvA^n@nr
*/ lz"OC<D}(
private void insertSort(int[] data, int start, int len) { BlXB7q,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }RmU%IYc
} kD*2~Z?;
} Ys@}3\Mc
} an|x$e7|?
} p8Q,@ql.
%;e/7`>Ma
堆排序： )^4\,u\@
T(e!_VY|m
package org.rut.util.algorithm.support; 3T"j)R_=l
> `n,S
import org.rut.util.algorithm.SortUtil; m\$\ 09
&m|wH4\
/** AT9q3
* @author treeroot T-5nB>)
* @since 2006-2-2 1jN-4&
* @version 1.0 Hz.(qW">5*
*/ :@%4
public class HeapSort implements SortUtil.Sort{ y>72{
DTaN"{
/* (non-Javadoc) 89\n;5'f4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ytz)d/3T
*/ bty/
public void sort(int[] data) { #bl6sa{E
MaxHeap h=new MaxHeap(); 5Cq{XcXV
h.init(data); ix(=3/Dgz
for(int i=0;i h.remove(); x9;gT&@H
System.arraycopy(h.queue,1,data,0,data.length); EGZb7:Y?
} O9EKRt
I9:Cb)hbU]
private static class MaxHeap{ l~6?kFy9h
>p.O0G gg
void init(int[] data){ uoHNn7W
this.queue=new int[data.length+1]; %,D<O,N
for(int i=0;i queue[++size]=data; &jsVw)Ue
fixUp(size); 7PANtCFb&
} 4g :>[q
} 5e$~)fL
F8;dKyT?q
private int size=0; dl~%MWAVb
?gJy3@D
private int[] queue; *d"DA[(
\ C+(~9@|
public int get() { m|=H#
return queue[1]; `e(vH`VZ
} Xlb0/T<g!
.Fnwm}
public void remove() { UEozAY
SortUtil.swap(queue,1,size--); 9G+V;0Q
fixDown(1); H&]gOs3So
} yil[gPy4B
file://fixdown SE),":aY
private void fixDown(int k) { ``OD.aY^s
int j; 'bo~%WA]n
while ((j = k << 1) <= size) { XLL/4)
if (j < size %26amp;%26amp; queue[j] j++; |!"2fI
if (queue[k]>queue[j]) file://不用交换 Iz ;G*W18
break; Yc,7tUz#
SortUtil.swap(queue,j,k); O2BW6Wc
k = j; 91$]Qg,lB
} %,Ap7X3:QT
} :{oZ~<
private void fixUp(int k) { ~-PjW#J%
while (k > 1) { df n9!h
int j = k >> 1; Q8DQlqHm
if (queue[j]>queue[k]) ;_^fk&+
break; |b-]n"}c>
SortUtil.swap(queue,j,k); Eh|]i;G%
k = j; G.(mp<-
} |37 g ~
} K91)qI;BD
w9o^s5n
} e_/b2"{
j{NNSi3
} f|R"uW +
u%/goxA
SortUtil： #*TEq
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package org.rut.util.algorithm; s1e:v+B]
Fd#m<"
import org.rut.util.algorithm.support.BubbleSort; oI.G-ChP
import org.rut.util.algorithm.support.HeapSort; l'\pk<V
import org.rut.util.algorithm.support.ImprovedMergeSort; lKlU-4
import org.rut.util.algorithm.support.ImprovedQuickSort; PSPmO'C+
import org.rut.util.algorithm.support.InsertSort; wlEdt1G
import org.rut.util.algorithm.support.MergeSort; * 1Od-3
import org.rut.util.algorithm.support.QuickSort; D5:{fWVsV/
import org.rut.util.algorithm.support.SelectionSort; 7}vg.hmZ
import org.rut.util.algorithm.support.ShellSort; @DZB9DDR
CT1ja.\;
/** *&d<yJM`b
* @author treeroot 6%fKuMpK(
* @since 2006-2-2 V^\8BVw
* @version 1.0 [-)r5Dsdq
*/ i} N8(B(
public class SortUtil { HO[wTB|D]
public final static int INSERT = 1; Tp0bS
public final static int BUBBLE = 2; 5cEcTJL[C
public final static int SELECTION = 3; SF5@Vg
public final static int SHELL = 4; i:Zm*+Gi
public final static int QUICK = 5; $2u 'N:o
public final static int IMPROVED_QUICK = 6; WdnIp!
public final static int MERGE = 7; :"l-KQ0
public final static int IMPROVED_MERGE = 8; bzvh%RsW
public final static int HEAP = 9; E@P %v{)
Qu7T[<
public static void sort(int[] data) { >P/][MT
sort(data, IMPROVED_QUICK); xY$iz)^0&
} Y}[c^$S
private static String[] name={ <}sq?Sfq!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cZ<A0
}; 6<'21
8P"_#M?!
private static Sort[] impl=new Sort[]{ h68]=KyK
new InsertSort(), IN,(yaC
new BubbleSort(), v$=QA:!U
new SelectionSort(), P0$e~=Q^4
new ShellSort(), ,9P:Draxs`
new QuickSort(), ixV0|P8,c
new ImprovedQuickSort(), r YF #^
new MergeSort(), }=|!:kiE
new ImprovedMergeSort(), qY>{cjo
new HeapSort() tqy@iEz+
}; eYC^4g%l(
o,xxh
public static String toString(int algorithm){ h(F<h_
return name[algorithm-1]; @]![o %
} bcAvM;
\'M3|w`f
public static void sort(int[] data, int algorithm) { ~u.T-0F
impl[algorithm-1].sort(data); EaWS. eK
} J!5v~<v?-
P<Zh XN'
public static interface Sort { lw :`M2P,
public void sort(int[] data); MCT'Nw@A
} qVdwfT{1J
B}eA\O4}I
public static void swap(int[] data, int i, int j) { UK{irU|\
int temp = data; F {B\kq8
data = data[j]; m~>Y{F2
data[j] = temp; 3 E3qd'
} _$p$")
} 3( ]M{4j