[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; vVi))%&S(
} g$ oe00b
int i1=l; )z#M_[zC>
int i2=mid+1; uua1_#a
for(int cur=l;cur<=r;cur++){ *!y.!v*
if(i1==mid+1) ,o)U9<
data[cur]=temp[i2++]; Q-GnNT7MB3
else if(i2>r) hq^@t6!C\m
data[cur]=temp[i1++]; pJ1Q~tI
else if(temp[i1] data[cur]=temp[i1++]; 8QGj:3
else `FM^)(wT
data[cur]=temp[i2++]; A{Q:,S)
} +tXOP|X
} ihJC)m`Hbl
y3O Nn~k
} ;hLne0|)}
[oQ&}3\XJ
改进后的归并排序: j\SW~}d9
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package org.rut.util.algorithm.support; yxa~Rz/
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import org.rut.util.algorithm.SortUtil; vYNh0)$%F
}3Y3f).ZW
/** ?=uw0~O[
* @author treeroot z!I(B^)BkT
* @since 2006-2-2 5Y8/ZW~D0
* @version 1.0 R]Q4+
*/ o= %Fh
public class ImprovedMergeSort implements SortUtil.Sort { uvrfR?%QK
1=t\|Th-
private static final int THRESHOLD = 10; emV@kN.
9)qjW&`
/* d6.9]V?
* (non-Javadoc) ?DC3BA\)
* N|ut^X+|\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $v6dB {%Qu
*/ Pl }dA
public void sort(int[] data) { 7^~pOFdH
int[] temp=new int[data.length]; _;BN;].
mergeSort(data,temp,0,data.length-1); 4JHFn [%
} oIM]
ya'@AJS
private void mergeSort(int[] data, int[] temp, int l, int r) { $[Fh|%\
int i, j, k; [N/[7Q/y
int mid = (l + r) / 2; u= K?K
if (l == r) gi7As$+E
return; n8M/Y}mH
if ((mid - l) >= THRESHOLD) M,Px.@tw.
mergeSort(data, temp, l, mid); *s6MF{Ds
else pAV}hB
insertSort(data, l, mid - l + 1); T@]vjXd![
if ((r - mid) > THRESHOLD) (r^IW{IndX
mergeSort(data, temp, mid + 1, r); /y,~?
else g'`J'6Pn
insertSort(data, mid + 1, r - mid); )]%GNdU
k:w\4Oqd
for (i = l; i <= mid; i++) { q*ZjOqj
temp = data; {A(=phN
} By@<N [I@
for (j = 1; j <= r - mid; j++) { +mP3y~|-j
temp[r - j + 1] = data[j + mid]; BcT|TX+ct
} 1Ly?XNS
int a = temp[l]; )G6]r$M>o0
int b = temp[r]; 2f]9I1{
for (i = l, j = r, k = l; k <= r; k++) { 2I'\o7Y
if (a < b) { Wv"[,5 Z13
data[k] = temp[i++]; 'Z7oPq6
a = temp; 0n_Cuh\
} else { O4&/g-
data[k] = temp[j--]; IjDG
b = temp[j]; ~`{HWmah
} fwIZr~l
} U3^T.i"R
} eN%Ks
Y:VM5r)
/** I,AI$A
* @param data 3yXF| yV
* @param l &,fBg6A%
* @param i Z$,1Tk"O/s
*/ `ge{KB;*n#
private void insertSort(int[] data, int start, int len) { r! 5C3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CD^_>sya
} _SC>EP8:Z
} R$*{@U
} WZCX&ui
} { >Y<!
c*_I1}l
堆排序： _-Aw`<_*-
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package org.rut.util.algorithm.support; ?/{ qRz'C<
xGqe )M>8?
import org.rut.util.algorithm.SortUtil; a'Qy]P}'Ug
q01zN:|-1
/** P!m~tu}B
* @author treeroot @-;-DB]j
* @since 2006-2-2 Xig+[2zS
* @version 1.0 1`m ~c
*/ yaA9*k
public class HeapSort implements SortUtil.Sort{ 5in6Y5ckj
wLU w'Ai
/* (non-Javadoc) ^<<( }3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5gV8=Ml"V
*/ ag?@5q3J}
public void sort(int[] data) { L"tj DAV
MaxHeap h=new MaxHeap(); ^?toTU
h.init(data); _q=$L eO5
for(int i=0;i h.remove(); /Yx 1S'5
System.arraycopy(h.queue,1,data,0,data.length); mxQS9y
} s+^o[R T3
>lyUr*4PX
private static class MaxHeap{ mb?DnP,z
i2$U##-ro]
void init(int[] data){ d Z"bc]z{
this.queue=new int[data.length+1]; )u]<8
for(int i=0;i queue[++size]=data; Tc\^=e^N?
fixUp(size); S_6`.@B}
} 7esG$sVj(
} tZU"Ud
A@_F ;4X
private int size=0; Z[AJat@H
E] t:_v
private int[] queue; J(M0t~RZ
ez86+
public int get() { T[<llh'+
return queue[1]; xvjHGgWSxc
} QhZ!A?':U
/43DR;4
public void remove() { ssi{(}H/Jv
SortUtil.swap(queue,1,size--); JO7IzD\
fixDown(1); BaiC;&(
} YT,1E>rd
file://fixdown `U!eh1*b
private void fixDown(int k) { ED"5y
int j; Y#{KGVT<
while ((j = k << 1) <= size) { 8o4<F%ot
if (j < size %26amp;%26amp; queue[j] j++; F!`.y7hY@
if (queue[k]>queue[j]) file://不用交换 g=b[V
break; $|6Le; K
SortUtil.swap(queue,j,k); cdP+X'Y4D
k = j; ))G%C6-
} Si*Pi
} GMgsM6.R
private void fixUp(int k) { d)r=W@tF]
while (k > 1) { \D,0
int j = k >> 1; ,`/!0Wmt
if (queue[j]>queue[k]) ui G7
break; G~a/g6M4
SortUtil.swap(queue,j,k); yKOf]m>#
k = j; 5&2=;?EO
} `W?aq]4x5
} '/;#{("
*-_` xe
} ):LJ {.0R
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} UH%?{>oRh
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SortUtil： q'+XTal
vxr3|2`
package org.rut.util.algorithm; :XBeGNI*#
l%fnGe` _
import org.rut.util.algorithm.support.BubbleSort; StP6G ]x
import org.rut.util.algorithm.support.HeapSort; 0NpxqeIDY
import org.rut.util.algorithm.support.ImprovedMergeSort; )/bt/,M&}
import org.rut.util.algorithm.support.ImprovedQuickSort; S][:b
import org.rut.util.algorithm.support.InsertSort; : [aUpX=
import org.rut.util.algorithm.support.MergeSort; A+Y>1-=JO
import org.rut.util.algorithm.support.QuickSort; Lkk'y})/
import org.rut.util.algorithm.support.SelectionSort; yn!LJT[~2
import org.rut.util.algorithm.support.ShellSort; c !P9`l~MQ
3Eiy/
/** ?)4|WN|c_
* @author treeroot 1xM&"p:
* @since 2006-2-2 _=q)lt-UY
* @version 1.0 }#EiL !Pv
*/ c4L5"_#`x-
public class SortUtil { X"iy.@7
public final static int INSERT = 1; X-oou'4<
public final static int BUBBLE = 2; 3{d1Jk/S
public final static int SELECTION = 3; wzo-V^+q
public final static int SHELL = 4; fRaVY`|wK
public final static int QUICK = 5; b%,5B
public final static int IMPROVED_QUICK = 6; A{9Hm:)
public final static int MERGE = 7; |%&WYm6&#
public final static int IMPROVED_MERGE = 8; B`RbXk68q
public final static int HEAP = 9; 1/gY]ghL
"M_X9n_
public static void sort(int[] data) { ~O@V;y
sort(data, IMPROVED_QUICK); o~<fw]y
} oc\rQ?
private static String[] name={ }4_izKS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7i334iQZ
}; te" 8ZmJ
a4g=cs<9}
private static Sort[] impl=new Sort[]{ vWe)cJ
new InsertSort(), 8EbYk2j
new BubbleSort(), _~Lhc'^p*
new SelectionSort(), s}`=pk/FM
new ShellSort(), V%e'H>EC
new QuickSort(), Eto0>YyZ
new ImprovedQuickSort(), 4vBZb^W;9
new MergeSort(), Z9=Cw0( w?
new ImprovedMergeSort(), Lk#u^|Eq7=
new HeapSort() Xb$)}n\9
}; ~+3f8%
6<]&T lS]
public static String toString(int algorithm){ <MvFAuAT
return name[algorithm-1]; f_D1zU^
} /,E%)K;
Y/gVyQ(
public static void sort(int[] data, int algorithm) { 1mI)xDi9
impl[algorithm-1].sort(data); w4(DR?[nC
} w`>xK sKW>
d<7xSRC
public static interface Sort { x-y=Jor
public void sort(int[] data); QhpE2ICU
} Z?"Pkc.Ei
3gv>AgG
public static void swap(int[] data, int i, int j) { eg?vYW
int temp = data; jn)~@~c
data = data[j]; m]7yc>uDy
data[j] = temp; 2R2Z6}
} /=m=i%& #
} db.iMBki