[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; XS">`9o!
} kJp~'\b
int i1=l; Ff%V1BH[
int i2=mid+1; -X~mW
for(int cur=l;cur<=r;cur++){ YT Zi[/
if(i1==mid+1) o]Rlivahm
data[cur]=temp[i2++]; d.^g#&h
else if(i2>r) (XQuRL<X
data[cur]=temp[i1++]; 6:O<k2=2
else if(temp[i1] data[cur]=temp[i1++]; m$kQbPlatN
else lOk8VlH<h
data[cur]=temp[i2++]; 9MYk5q.X:
} =y4dR#R(\
} !6T"J!F#
~?AEtl#&"
} C=/B\G/.9
J+J,W5t^
改进后的归并排序: #uw&u6*\q
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package org.rut.util.algorithm.support; U8w_C\Q
[/UchU]DT
import org.rut.util.algorithm.SortUtil; *q*3SP/
Wc[,kc
/** a/,>fv9;$
* @author treeroot akxNT_
* @since 2006-2-2 Y8\P"qb
* @version 1.0 uv27Vos
*/ YR9fw
public class ImprovedMergeSort implements SortUtil.Sort { A913*O:\
BzP,Tu{,
private static final int THRESHOLD = 10; 6t6Z&0$h~
cKe%P|8
/* 6(Pan%
* (non-Javadoc) `X6JZxGyd
* {P]C>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W(`QbNJ
*/ rtRbr_
public void sort(int[] data) { S3E,0%yo+)
int[] temp=new int[data.length]; &)%+DUV|
mergeSort(data,temp,0,data.length-1); H<Oo./8+
} L^3&
2gPqB*H
private void mergeSort(int[] data, int[] temp, int l, int r) { 0jf6 z-4
int i, j, k; \ ;npdFy
int mid = (l + r) / 2; ,vJt!}}
if (l == r) HYmC3
return; tcuwGs>_
if ((mid - l) >= THRESHOLD) U]iI8c
mergeSort(data, temp, l, mid); QO/0VB42
else 50W+!'
insertSort(data, l, mid - l + 1); d,b4q&^X8
if ((r - mid) > THRESHOLD) 5^u$zfR
mergeSort(data, temp, mid + 1, r); ?pTX4a&>
else <+i(CGw
insertSort(data, mid + 1, r - mid); $zMshLT
mll:rWC)
for (i = l; i <= mid; i++) { _h~ksNm5u
temp = data; 0=j }`
} lW&(dn)}
for (j = 1; j <= r - mid; j++) { ~2w&+@dV%
temp[r - j + 1] = data[j + mid]; +jGHR&A t
} /SD}`GxH
int a = temp[l]; cqS :Zq
int b = temp[r]; {ALEK
for (i = l, j = r, k = l; k <= r; k++) { nqcq3o*B
if (a < b) { W)In.?>]W
data[k] = temp[i++]; Ke\\B o,
a = temp; HTJ2D@h
} else { 6pt_cpbR
data[k] = temp[j--]; z)qYW6o%
b = temp[j]; tS'lJu
} / (&E
} _FY&XL=
} Fb5U@X/vE
jT{T#_
/** sgX!4wG&Z
* @param data 2bp@m;g$
* @param l I0Pw~Jj{
* @param i lkn|>U[
*/ 0bg"Q4
private void insertSort(int[] data, int start, int len) { 94u{k1d x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .+9hm|
} #z*,CU#S9d
} H_DCdUgC'
} K p3}A$uV
} za>UE,?h
t]yxLl\
堆排序： OXEk{#Uf[3
Z2%HQL2
package org.rut.util.algorithm.support; zM9#1^X
=)[m[@,c
import org.rut.util.algorithm.SortUtil; =q4}(
*'<AwG&
/** ^\\3bW9}H
* @author treeroot :!`"GaTy
* @since 2006-2-2 Da=EAG-{7
* @version 1.0 Mt[yY|Ec|
*/ QU"WpkO
public class HeapSort implements SortUtil.Sort{ ~MC|
k ut=(;
/* (non-Javadoc) ZZw`8 E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WE<?y_0y&
*/ N9e'jM>Oos
public void sort(int[] data) { "TV'}HH
MaxHeap h=new MaxHeap(); 4CNrIF@
h.init(data); D*XrK0#Z`
for(int i=0;i h.remove(); QQ*sjK.(
System.arraycopy(h.queue,1,data,0,data.length); o.+;]i}D
} Dp@XAyiA[
~ZHjP_5Q
private static class MaxHeap{ oxwbq=a6yV
[2%[~&4
void init(int[] data){ vl"w,@V7
this.queue=new int[data.length+1]; Hq3|>OqC2Q
for(int i=0;i queue[++size]=data; K$CC ~,D
fixUp(size); zC?'Qiuh*
} Y[ G_OoU
} ]ss[n.T0*
zA,vp^
private int size=0; CWj_K2=d
Av X1*
private int[] queue; N'Gq9A
XHr*Rs.[=
public int get() { w+M/VsL
return queue[1]; {!"UBALxc
} NVyBEAoh
w_9^YO!!
public void remove() { C"hN2Z!CD|
SortUtil.swap(queue,1,size--); @KN+)qP
fixDown(1); #lYyL`B+~
} 6EqA Y`y
file://fixdown q!Du J
private void fixDown(int k) { 7#V7D6j1
int j; U( YAI%O
while ((j = k << 1) <= size) { #EzBB*kP
if (j < size %26amp;%26amp; queue[j] j++; \Z-th,t
if (queue[k]>queue[j]) file://不用交换 vgfC{]v<W]
break; }K{1Bm@S
SortUtil.swap(queue,j,k); :6n#y-9^1
k = j; 3]Z1kB
} Z%t_1t
} 6FUW^dt
private void fixUp(int k) { YEL0h0gn
while (k > 1) { })g<I+]Hf9
int j = k >> 1; ]33!obM
if (queue[j]>queue[k]) TOwd+]B
break; &?<uR)tl
SortUtil.swap(queue,j,k); @Jt$92i5PS
k = j; -JW~_Q[
} S}6Ld(_
} 5NU{y+
Ln"wjO,
} ;kFD769DLw
ClG%zE&i
} 2qMiX|Y
wQ_4_W
SortUtil： ~#_~DqbMZ5
:@A&HkF
package org.rut.util.algorithm; Y },E3<
/K=OsMl2b8
import org.rut.util.algorithm.support.BubbleSort; |/Nh#
import org.rut.util.algorithm.support.HeapSort; *a9cBl'_
import org.rut.util.algorithm.support.ImprovedMergeSort; 8 Rx@_
import org.rut.util.algorithm.support.ImprovedQuickSort; l|CM/(99-
import org.rut.util.algorithm.support.InsertSort; _NDQ2O
import org.rut.util.algorithm.support.MergeSort; uP~,]ci7
import org.rut.util.algorithm.support.QuickSort; ^T=9j.e'ja
import org.rut.util.algorithm.support.SelectionSort; B8&q$QV
import org.rut.util.algorithm.support.ShellSort; q_MN
\PrJy6&
/** iw@rW5%'~
* @author treeroot L9b.D<
* @since 2006-2-2 u3T-U_:jSV
* @version 1.0 mm/\\my
*/ c<lp<{;
public class SortUtil { 2Q^q$@L
public final static int INSERT = 1; i7x&[b
public final static int BUBBLE = 2; n,N->t$i
public final static int SELECTION = 3; #bOv}1,s
public final static int SHELL = 4; M/3;-g
public final static int QUICK = 5; m+QS -woHn
public final static int IMPROVED_QUICK = 6; ]OAU&t{
public final static int MERGE = 7; Z@~gN5@,M
public final static int IMPROVED_MERGE = 8; Kb~nC6yJc
public final static int HEAP = 9; _4{0He`q
73Dxf -
public static void sort(int[] data) { !:{Qbv&T
sort(data, IMPROVED_QUICK); wNB?3v{n
} bz*@[NQ
private static String[] name={ 'L/)9.29
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .N(R~_
}; 7e_4sxg'(3
~ua(Qm
private static Sort[] impl=new Sort[]{ -[mmT'sS
new InsertSort(), +a,SP
new BubbleSort(), QiCia#_
new SelectionSort(), pdu1 kL
new ShellSort(), .K C* (}-
new QuickSort(), O=K lc+Oo
new ImprovedQuickSort(), _u]Z+H"
new MergeSort(), >AEp\*
new ImprovedMergeSort(), D T5d]MU
new HeapSort() u>XXKlW:
}; ; 476t
Agcss20.
public static String toString(int algorithm){ c`E>7Hjr-
return name[algorithm-1]; #MC#K{Xd
} -l[H]BAMXy
K,4Ig!
public static void sort(int[] data, int algorithm) { z#{Y>.b
impl[algorithm-1].sort(data); FZ*"^=)`G
} " ityx?
l\_!oa~
public static interface Sort { R|?n
public void sort(int[] data); B`SX3,3
} <spG]Xa<
x[A|@\Z
public static void swap(int[] data, int i, int j) { 757&bH|a
int temp = data; l)r\SE1
data = data[j]; y-pdAkDh
data[j] = temp; :zW? O#aL-
} 01(U)F\
} [* xdILj