[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; jIdhmd* $z
} (:T~*7/"
int i1=l; ={maCYlE.
int i2=mid+1; =Z-.4\3
for(int cur=l;cur<=r;cur++){ i-E&Y*\^9H
if(i1==mid+1) )J#@L*
data[cur]=temp[i2++]; 62vz 'b
else if(i2>r) JI\u -+BE
data[cur]=temp[i1++]; vgE5(fJh
else if(temp[i1] data[cur]=temp[i1++]; PI0/=kS
else fvNGGn!
data[cur]=temp[i2++]; m@HU;J\I
} XTW/3pB
} y'pG'"U]_
v/yk T9@;
} >Ckb9A
$ HUCp9
改进后的归并排序: 3v0)oK
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package org.rut.util.algorithm.support; 2? !b!
7^Onq0ym T
import org.rut.util.algorithm.SortUtil; |Q:`:ODy`5
]Dx?HBM"DC
/** u4+VG5.rhT
* @author treeroot cVulJ6
* @since 2006-2-2 ^O892-R
* @version 1.0 2N)vEUyDV
*/ P$4?-AZ
public class ImprovedMergeSort implements SortUtil.Sort { m?B@VDZ
?+Qbr$]
private static final int THRESHOLD = 10; (x=NA )
Mu:*(P/
/* #lVVSrF,-
* (non-Javadoc) OH=Ffy F,
* PwDQ<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qVM]$V#e
*/ $<33E e:a
public void sort(int[] data) { Uc9Uj
int[] temp=new int[data.length]; 6K<vyr40
mergeSort(data,temp,0,data.length-1); :EA,0 ,
} OB$A"XGAEV
QT-rb~
private void mergeSort(int[] data, int[] temp, int l, int r) { ?=4J
int i, j, k; *jW$AH
int mid = (l + r) / 2; +Tu:zCv.
if (l == r) -@#AQ\
return; 9U;) [R Mb
if ((mid - l) >= THRESHOLD) )(!vd!p5
mergeSort(data, temp, l, mid); .)W8 U [
else DDkOg]
insertSort(data, l, mid - l + 1); MCYrsgg}
if ((r - mid) > THRESHOLD) 45-pJf8F
mergeSort(data, temp, mid + 1, r); c8}1-MKs_R
else vk#xCggK
insertSort(data, mid + 1, r - mid); _wHqfj)
7CQ48LH]
for (i = l; i <= mid; i++) { jliKMd<?
temp = data; "HYK~V
} 2'@0|k,yC
for (j = 1; j <= r - mid; j++) { 14^t{
temp[r - j + 1] = data[j + mid]; o^AK@\e:^Z
} \j K?R 6
int a = temp[l]; +F0M?,
int b = temp[r]; zR`]8E]
for (i = l, j = r, k = l; k <= r; k++) { x3M`l|
if (a < b) { i.byHz?/
data[k] = temp[i++]; ^AEg?[q
a = temp; ZMx<:0ai
} else { 6SidH_&C
data[k] = temp[j--]; p$"*U[%l
b = temp[j]; 8Ipyr%l
} Y8CXinh
} v4S|&m
} 'rCwPsI&4
dB1bf2'b#
/** S:R%%cy
* @param data m*a0V
* @param l e1'_]
* @param i rP>5OLP
*/ ^Nc\D7( l
private void insertSort(int[] data, int start, int len) { 4Q!*h8O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sjzZl*GSy
} kU#$
} #U6Wv1H{Lp
} *.~M#M 9c
} .UJDn^@
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堆排序： rN>f"/J |
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package org.rut.util.algorithm.support; sa*hoL18
9vVYZ}HC
import org.rut.util.algorithm.SortUtil; -aec1+o
8cW]jm
/** `Y'}\>.#
* @author treeroot $aVcWz%
* @since 2006-2-2 UHxXa*HyI
* @version 1.0 7W 4[1
*/ sM-k,0z
public class HeapSort implements SortUtil.Sort{ ,>e<mphM
&{7%VsTB
/* (non-Javadoc) fw-LZ][
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pw+cpM8<
*/ 7DT9\BT
public void sort(int[] data) { o{ U= f6
MaxHeap h=new MaxHeap(); -lLq)
h.init(data); -o=qYkyLK
for(int i=0;i h.remove(); 1o.]"~0:
System.arraycopy(h.queue,1,data,0,data.length); = [:ruE
} t/nu/yz5E
>pn?~
private static class MaxHeap{ [Si`pPvl
<ZCjQkka>r
void init(int[] data){ Aw >DZ2
this.queue=new int[data.length+1]; 'Z;R!@Dm
for(int i=0;i queue[++size]=data; 7<X_\,I
fixUp(size); kkh#VGh"
} *78TT\q<
} .PF~8@1ju
m:K/)v*
private int size=0; WJ/&Ag1
HhIa=,VY
private int[] queue; tn:tM5m
M|e@N
public int get() { Nhuw8Xv
return queue[1]; J/ 4kS<c
} Pc1vf]
0 5 `x$f
public void remove() { ?L7z\b"_~
SortUtil.swap(queue,1,size--); q?JP\_o:
fixDown(1); hXZk$a'
} S{&;
file://fixdown _W&.{ 7
private void fixDown(int k) { ]BX|G`CCc
int j; I)n%aTfo8
while ((j = k << 1) <= size) { !WAbO(l
if (j < size %26amp;%26amp; queue[j] j++; lKwIlp
if (queue[k]>queue[j]) file://不用交换 OBu$T&
break; 'Kc;~a
SortUtil.swap(queue,j,k); ~kF^0-JZY
k = j; (i&:=Bfn)
} joYj`K
} 7)<&,BWc
private void fixUp(int k) { NouT~K`'
while (k > 1) { Sh=z
int j = k >> 1; n{=vP`V_
if (queue[j]>queue[k]) ~#OnA1)
break; <Y<%=`
SortUtil.swap(queue,j,k); ".~,(*
k = j; UG 9uNgzQ/
} %nT!u!#
} 0<nk>o
iCa#OQ
} jIg]?4bW[
@2Z{en?
} }eSaF@.
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SortUtil： AvH^9zEE(
qy/xJ>:
package org.rut.util.algorithm; f D2.Zh
eUQrn>`
import org.rut.util.algorithm.support.BubbleSort; FL9Dz4
import org.rut.util.algorithm.support.HeapSort; O_*%_S}F&
import org.rut.util.algorithm.support.ImprovedMergeSort; 3Vs8"BFjz
import org.rut.util.algorithm.support.ImprovedQuickSort; 0.=dOz r
import org.rut.util.algorithm.support.InsertSort; N-y[2]J90
import org.rut.util.algorithm.support.MergeSort; "V}WV!w
import org.rut.util.algorithm.support.QuickSort; |!,;IoZ
import org.rut.util.algorithm.support.SelectionSort; 1F{c5
import org.rut.util.algorithm.support.ShellSort; SwXVa/9a"
<D%.'=%pZ
/** 6 -N 442
* @author treeroot (gQP_Oa(
* @since 2006-2-2 k`_sKr]9
* @version 1.0 \0). ODA(
*/ f;x0Ho5C2
public class SortUtil { Jx!#y A;
public final static int INSERT = 1; e?,n>
public final static int BUBBLE = 2; 58V`I5_
public final static int SELECTION = 3; <Y:{>=
public final static int SHELL = 4; Nu/wjx$b
public final static int QUICK = 5; B/0Xqyu
public final static int IMPROVED_QUICK = 6; whxTCIV
public final static int MERGE = 7; .J"QW~g^
public final static int IMPROVED_MERGE = 8; Uc^eIa@
public final static int HEAP = 9; )%dxfwd6
j 4!$[h
public static void sort(int[] data) { x8 _f/2&
sort(data, IMPROVED_QUICK); u%!/-&?wF
} GRM6H|.
private static String[] name={ ;G.5.q[A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^CO{86V
}; c#(Hh{0
-Aaim`06bv
private static Sort[] impl=new Sort[]{ 0"}J!c<g
new InsertSort(), N?`V;`[
new BubbleSort(), -M5vh~Tp
new SelectionSort(), dhv?36uE
new ShellSort(), HCfme<'
new QuickSort(), #9zpJ\E
new ImprovedQuickSort(), y)vK=,"
new MergeSort(), /#jH#f[
new ImprovedMergeSort(), 6I2`oag
new HeapSort() @<(4J
}; )Fon;/p
E@,m+
public static String toString(int algorithm){ FJ,"a%m/Q
return name[algorithm-1]; }C4wED.
} s|IY t^
6~c#G{kc
public static void sort(int[] data, int algorithm) { 4Hy/K^Ci
impl[algorithm-1].sort(data); 7zM9K+3L
} HxSq&j*F
)G#mC0?PV
public static interface Sort { /|q.q
public void sort(int[] data); ysapvQN_6
} VWq]w5oQO
'_d4[Olu
public static void swap(int[] data, int i, int j) { 0vX4v)-^u
int temp = data; xt_:R~/[
data = data[j]; aD]! eP/)
data[j] = temp; wg%g(FO
} &hEn3u
} CRBj>