[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; DD5S R
} ~0/tU#&
int i1=l; D_kz'0^|
int i2=mid+1; ML eo3
for(int cur=l;cur<=r;cur++){ g2)jd[GM
if(i1==mid+1) 2w"Xv,*.'i
data[cur]=temp[i2++]; |W $epOLg
else if(i2>r) tf<}%4G
data[cur]=temp[i1++]; #x|xL7
else if(temp[i1] data[cur]=temp[i1++]; /,Unp1D
else Y%$@ZYW
data[cur]=temp[i2++]; GY%^!r
} S\wh *'Y
} ygI81\D
t3LRmjL
} H[oCI|k
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改进后的归并排序: JzuU k
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package org.rut.util.algorithm.support; )\K;Ncp[
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import org.rut.util.algorithm.SortUtil; QEtf-xNn^
5~8FZ-x
/** <=O/_Iu(
* @author treeroot +ftOJFkI
* @since 2006-2-2 Hg[g{A_G[
* @version 1.0 -!_\4
*/ o}^/Km+t
public class ImprovedMergeSort implements SortUtil.Sort { @bfW-\ I
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private static final int THRESHOLD = 10; Ei$?]~ &
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/* \Dn47V{7-
* (non-Javadoc) Q5K<ECoPk
* `3wzOMgJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t?&@bs5~g
*/ Xgb ~ED]
public void sort(int[] data) { d;:H#F+ (
int[] temp=new int[data.length]; MawWgd*
mergeSort(data,temp,0,data.length-1); XHN*'@ 77;
} s}1S6*Cr
cpY'::5.%
private void mergeSort(int[] data, int[] temp, int l, int r) { XEX."y
int i, j, k; p*LG Y+
int mid = (l + r) / 2; &Y`V A
if (l == r) c>~q2_}W(
return; E8gbm&x*
if ((mid - l) >= THRESHOLD) !\'NBq,
mergeSort(data, temp, l, mid); KCDbE6
else LA +BH_t&
insertSort(data, l, mid - l + 1); ' \8|`Zb
if ((r - mid) > THRESHOLD) bh Nqj
mergeSort(data, temp, mid + 1, r); f52*s#4}
else h=a-~= 8
insertSort(data, mid + 1, r - mid); 9>QGsf.3
Gl!fT1zh0
for (i = l; i <= mid; i++) { 'ptD`)^(
temp = data; \jR('5DcB
} r0Cc0TMdj
for (j = 1; j <= r - mid; j++) { II,snRD
temp[r - j + 1] = data[j + mid]; b '9L}q2m
} 9e aqq
int a = temp[l]; V eD<1<
int b = temp[r]; 'c[|\M!u
for (i = l, j = r, k = l; k <= r; k++) { #E'aa'P}
if (a < b) { (9!/bX<
data[k] = temp[i++]; %B#(d)T*-
a = temp; <i1.W!%
} else { <u=k X
data[k] = temp[j--]; 'B"A*!"b
b = temp[j]; &x mYpQ
} G=VbEL^H
} AcoU.tpP
} 0m&
|Q|vCWel{
/** h=x{ 3P;B
* @param data TXH9BlDn
* @param l 4tGP- L
* @param i 5eL_iNqJM
*/ Qnr7Qnb
private void insertSort(int[] data, int start, int len) { VX'cFqrK3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R3dt-v
} asj*/eC$/i
} )ZHo7X
} Ho^rYz
} 2a,l;o$2&
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堆排序： <H]1 6
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package org.rut.util.algorithm.support; Q>QES-.l
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import org.rut.util.algorithm.SortUtil; lFZ}.
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/** CS\ E]f
* @author treeroot f8AgTw,K8
* @since 2006-2-2 4Yx\U
* @version 1.0 13f@Ox$
*/ WF&?OHf2
public class HeapSort implements SortUtil.Sort{ m Bc2x8g)
j~#nJI5]
/* (non-Javadoc) jn:9Cr,o;g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,x]xtg?
*/ U%qE=u-
public void sort(int[] data) { 2<X.kM?N{B
MaxHeap h=new MaxHeap(); +#wh`9[wBt
h.init(data); \|wUxijJ*,
for(int i=0;i h.remove(); wVMR&R<t
System.arraycopy(h.queue,1,data,0,data.length); &}."sGK
} }iBFo\vU
loR,f&80=O
private static class MaxHeap{ 84|oqwZO
g/_j"Nn
void init(int[] data){ Yg<4}l."
this.queue=new int[data.length+1]; BJ$\Mb##3@
for(int i=0;i queue[++size]=data; GyP.;$NHa[
fixUp(size); LagHzCB
} l+!eC lM%
} ~IhLjE
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private int size=0; 9% wVE]
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private int[] queue; W81dLeTZg
83[gV@LW0m
public int get() { 67]kT%0
return queue[1]; r}%2;!T
} _=*ph0nu
J 6%CF2
public void remove() { QY}1i .f
SortUtil.swap(queue,1,size--); W}0cM9 g
fixDown(1); =j&qat
} rV[/G#V>{
file://fixdown +.Cx.Nf(
private void fixDown(int k) { "u=U@1 ^
int j; !L|PDGD
while ((j = k << 1) <= size) { I4RUXi 5
if (j < size %26amp;%26amp; queue[j] j++; P"k`h=>!4
if (queue[k]>queue[j]) file://不用交换 PrwMR_-
break; >M-ZjT>
SortUtil.swap(queue,j,k); |w)S &+
k = j; \]$TBN dJ4
} .R! /?eN
} S)L(~N1
private void fixUp(int k) { 2z+-vT%
while (k > 1) { \7elqX`.yY
int j = k >> 1; g$a 5
if (queue[j]>queue[k]) '|~L9t
break; YVT\@+C'
SortUtil.swap(queue,j,k); %!HBPLk
k = j; 4Y!_tZ>
} ;G\RGU~
} HgfeSH
xmp^`^v*
} CgxGvM4
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} g*a|QBj%
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SortUtil： ckCb)r_
oe,37xa4
package org.rut.util.algorithm; 2Ysl|xRo
ZBcT@hxm
import org.rut.util.algorithm.support.BubbleSort; @b2JR^
import org.rut.util.algorithm.support.HeapSort; -ZKo/N>6}
import org.rut.util.algorithm.support.ImprovedMergeSort; j$Unw
import org.rut.util.algorithm.support.ImprovedQuickSort; 9d8bh4[
import org.rut.util.algorithm.support.InsertSort; T>e4Og"?
import org.rut.util.algorithm.support.MergeSort; ouO<un
import org.rut.util.algorithm.support.QuickSort; DuzJQSv
import org.rut.util.algorithm.support.SelectionSort; FXd><#U
import org.rut.util.algorithm.support.ShellSort; i<>zN^zn
p^/6Rb"e
/** #lo1GoL\
* @author treeroot \&#pJBBG
* @since 2006-2-2 B33H,e)
* @version 1.0 VzZ'W[/7)B
*/ `fm^#Nw
public class SortUtil { u?-X07_
public final static int INSERT = 1; PY{])z3N
public final static int BUBBLE = 2; !b:;O +[
public final static int SELECTION = 3; cZd{K[fuK
public final static int SHELL = 4; '(o*l
public final static int QUICK = 5; yL.Z{wd
public final static int IMPROVED_QUICK = 6; uFH ]w]X
public final static int MERGE = 7; t.YY?5l
public final static int IMPROVED_MERGE = 8; (I7s[
public final static int HEAP = 9; b0n " J`
p;k7\7
public static void sort(int[] data) { 0Xx&Z8E
sort(data, IMPROVED_QUICK); kH9P(`;Vq
} ,'0Zd(s
private static String[] name={ o1B8_$aYgc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uhJnDo
}; x.ZW%P1
+#Q\;;FNP
private static Sort[] impl=new Sort[]{ \ =(r6X
new InsertSort(), -YD+xPD
new BubbleSort(), I C?bqC+
new SelectionSort(), 8a}et8df:
new ShellSort(), -Nn@c|fz
new QuickSort(), 'Bc{N^
new ImprovedQuickSort(), 08 $y1;
new MergeSort(), L2GUrf
new ImprovedMergeSort(), ln~;Osb
new HeapSort() M}cgVMW
}; 5:r*em
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public static String toString(int algorithm){ EJ&aT etQ
return name[algorithm-1]; nz%{hMNYH
} zUNWcv!& "
%n7Y5|Uh
public static void sort(int[] data, int algorithm) { 3LK]VuZE
impl[algorithm-1].sort(data); g.9:R=JPT
} vvvH5NRm
~8#Ku,vEy
public static interface Sort { _/(7:
public void sort(int[] data); wEu"X
} ML9nfB^z!
8:QnxrODP
public static void swap(int[] data, int i, int j) { njoU0f1`
int temp = data; ) }.<lSw
data = data[j]; =iZj&B X
data[j] = temp; 9PZY](/
} &Ub0o2+y
} Nd] w I|>