[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; Y!<m8\
} E]@&<TFq
int i1=l; V?u#WJy/
int i2=mid+1; %Rk|B`ST
for(int cur=l;cur<=r;cur++){ 2Vx4"fHP#N
if(i1==mid+1) t?GH V3V
data[cur]=temp[i2++]; !mNst$-H4
else if(i2>r) O?e9wI=H
data[cur]=temp[i1++]; yLa@27T\A
else if(temp[i1] data[cur]=temp[i1++]; VgHO&vU
else Xh@K89`uX
data[cur]=temp[i2++]; mU/o%|h
} \O|SPhaIf
} h*S"]ye5
C >*z^6Gz
} P<]U
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改进后的归并排序: @>8(f#S%
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package org.rut.util.algorithm.support; qOo4T@t3
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import org.rut.util.algorithm.SortUtil; <o(;~
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/** !M~:#k
* @author treeroot HMq}){=S
* @since 2006-2-2 =3bk=vy
* @version 1.0 'm`O34h
*/ '.|}
public class ImprovedMergeSort implements SortUtil.Sort { tia}&9;
i 8sv,P
private static final int THRESHOLD = 10; @@Q4{o
c9|4[_&B~
/* V;SfW2`)
* (non-Javadoc) P27Ot1px
* g0,~|.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M^kaik
*/ yX&# rI
public void sort(int[] data) { v^C\ GDH
int[] temp=new int[data.length]; ;j0.#P:a
mergeSort(data,temp,0,data.length-1); e9p/y8gC
} -h8mJ D%Oi
<exCK*G
private void mergeSort(int[] data, int[] temp, int l, int r) { [<B,6nAl
int i, j, k; h[(YH ;Y
int mid = (l + r) / 2; HYl+xH'.j
if (l == r) 2f(`HSC'
return; +k=*AQt^8
if ((mid - l) >= THRESHOLD) UN?tn}`!
mergeSort(data, temp, l, mid); xM_#FxJb
else HS=w9:,
insertSort(data, l, mid - l + 1); whI4@#
if ((r - mid) > THRESHOLD) #hBqgG:>
mergeSort(data, temp, mid + 1, r); _kD5pC =
else X"Eqhl<t
insertSort(data, mid + 1, r - mid); k7Nx#%xx
LsR<r1KDJ
for (i = l; i <= mid; i++) { ca=MUm=B
temp = data; kV8R.Baf3
} 1^k}GXsWmE
for (j = 1; j <= r - mid; j++) { !+$qSD,%x
temp[r - j + 1] = data[j + mid]; 9No6\{[M
} zZ}.2He8
int a = temp[l]; puOMtCI
int b = temp[r]; x.gzsd
for (i = l, j = r, k = l; k <= r; k++) { -dMH>e0
if (a < b) { nu^@}|UG
data[k] = temp[i++]; !jP[=
a = temp; .UxkTads
} else { e\z,^
data[k] = temp[j--]; 9Zx| L/\
b = temp[j]; u9_?c G-
} YWPkVvI
} -/8V2dv3
} UXSwd#I&
w[2E:Nj
/** i@{b+5$
* @param data Pw6l'
* @param l .==c~>N
* @param i +fvVora
*/ Njo.-k
private void insertSort(int[] data, int start, int len) { uToi4]w"y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p7},ymQ|YQ
} BDp(&=ktq
} *`s*l+0b
} w^~s4Q_>>
} 6/a%%1c1
P EzT|uY
堆排序： a#0*#&?7@
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package org.rut.util.algorithm.support; +MS*YpPW
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import org.rut.util.algorithm.SortUtil; vSQB~Vw8t
^(*eoe
/** 8yr-X!eF
* @author treeroot *{fZA;<R
* @since 2006-2-2 j%!xb><
* @version 1.0 H2_6m5[&,
*/ c:DV8'fT
public class HeapSort implements SortUtil.Sort{ nQw, /Lk
&WbHM)_n
/* (non-Javadoc) qE^u{S4Z@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Swv =gu
*/ >wV2` 6
public void sort(int[] data) { O|;|7fCB\
MaxHeap h=new MaxHeap(); .v) A|{:2
h.init(data); $nthMx$
for(int i=0;i h.remove(); N[=R$1\Z
System.arraycopy(h.queue,1,data,0,data.length); !;PKx]/&
} Mc|UD*Z
pr"q-S>E
private static class MaxHeap{ 7*&q"
Jpe\
void init(int[] data){ Yv;iduc('
this.queue=new int[data.length+1]; a '<B0'
for(int i=0;i queue[++size]=data; p6{8t}
fixUp(size); w##$SaTI
} Ut"F b
} ;#2yF34gv
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private int size=0; WGMEZx
w#$Q?u ,G
private int[] queue; JLxAk14lc
[1`&\C_E
public int get() { pL'+sW
return queue[1]; &q[`lIV,L
} #.W<[KZf
%,5_]bGvb
public void remove() { 8DJoQl9
SortUtil.swap(queue,1,size--); t'Pn*
fixDown(1); czp}-{4X
} (ft$ R?
file://fixdown uyWt{>$
private void fixDown(int k) { k| ,F/:
int j; U> 1voc
while ((j = k << 1) <= size) { Ut^ {4_EC
if (j < size %26amp;%26amp; queue[j] j++; ]EPFyVt~3
if (queue[k]>queue[j]) file://不用交换 L(qQ,1VY
break; (E?X@d iu
SortUtil.swap(queue,j,k); CrI:TB>/"
k = j; iwnFCZVS
} PPSSar
} s8 0$
private void fixUp(int k) { $4&e{fLt|v
while (k > 1) { x.~AvJ
int j = k >> 1; gCY%@?YyN
if (queue[j]>queue[k]) Mu]1e5^]
break; iqPMCOPZ
SortUtil.swap(queue,j,k); <mdHca
k = j; +&h<:/ V
} $UGX vCR
} VsM~$ )
xF8^#J6>
} },LO]N|
8%D 2G i
} ev;R; 0<
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SortUtil： '6zD`Q
zBTyRL l
package org.rut.util.algorithm; R9`37(c9+
%qqX-SF0C
import org.rut.util.algorithm.support.BubbleSort; 2Ub!wee
import org.rut.util.algorithm.support.HeapSort; Y(3X5v?[
import org.rut.util.algorithm.support.ImprovedMergeSort; =9AX\2w*H;
import org.rut.util.algorithm.support.ImprovedQuickSort; ic(`Ev
import org.rut.util.algorithm.support.InsertSort; sbi+o,%1
import org.rut.util.algorithm.support.MergeSort; txp^3dZ`^
import org.rut.util.algorithm.support.QuickSort; 6wY6*R
import org.rut.util.algorithm.support.SelectionSort; KJ;;825?
import org.rut.util.algorithm.support.ShellSort; 7)#8p@Q
5.3=2/
/** `8sC>)lrwu
* @author treeroot M4`.[P4
* @since 2006-2-2 o1zKns?
* @version 1.0 qRnD{g|{1
*/ yrVk$k#6}
public class SortUtil { U8gf_R'
public final static int INSERT = 1; he\ pW5p
public final static int BUBBLE = 2; 'V#$PZx
public final static int SELECTION = 3; 6(0ME$
public final static int SHELL = 4; }s++^uX6
public final static int QUICK = 5; J':x]_;
public final static int IMPROVED_QUICK = 6; -b`O"Ck*
public final static int MERGE = 7; {|D7H=f
public final static int IMPROVED_MERGE = 8; Qf#=Y j
public final static int HEAP = 9; gql^Inx<
D@ 4sq^|2
public static void sort(int[] data) { zz_(*0,Qcr
sort(data, IMPROVED_QUICK); EwX:^1f
} _my!YS5n
private static String[] name={ ews{0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V krjs0
}; p38RgEf
E,p4R%:$@1
private static Sort[] impl=new Sort[]{ %("WoBPH`
new InsertSort(), 1 ` ={**
new BubbleSort(), \;bDDTM
new SelectionSort(), mP[ZlS~"
new ShellSort(), Zv&<r+<g
new QuickSort(), 8RaRXnJ
new ImprovedQuickSort(), s9F{UN3
new MergeSort(), w)7s]Ld
new ImprovedMergeSort(), 4IGn,D^
new HeapSort() :xy4JRcF
}; _oAWj]~rO
6O\a\z
public static String toString(int algorithm){ u%b.#!
return name[algorithm-1]; B6J<
} 94Q?)0W$
B`mTp01
public static void sort(int[] data, int algorithm) { ,%<ICusZ
impl[algorithm-1].sort(data); X]+z:!
} )PCh;P0C
ni~1)"U.
public static interface Sort { aaRc?b'/
public void sort(int[] data); /Xf_b.ZM&
} W!B\VB
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public static void swap(int[] data, int i, int j) { SbK6o:[
int temp = data; ocPM zq-
data = data[j]; D*}_L
data[j] = temp; lOEB ,/P
} n7VQi+i'
} EK2mJCC|