[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; IH`7ou{
} pd|l&xvka
int i1=l; Q9c*I,Oj
int i2=mid+1; ?4#
for(int cur=l;cur<=r;cur++){ nchpD@'t
if(i1==mid+1) Ce~Pms]
data[cur]=temp[i2++]; If8Lt}-
else if(i2>r) g][n1$%
data[cur]=temp[i1++]; a]J>2A@-I
else if(temp[i1] data[cur]=temp[i1++]; ol~ tfS
else zCv)%y
data[cur]=temp[i2++]; @vL0gzE?nB
} !^EA}N.u
} a5(9~.9
>}/T&S
} P`S'F_IN
^)o]hE|
改进后的归并排序: '$VP\Gj.
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package org.rut.util.algorithm.support; \mZB*k)+
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import org.rut.util.algorithm.SortUtil; (=j/"Mb
dA<SVk*0Q
/** \9~Q+~@{G
* @author treeroot [x- 9m\h
* @since 2006-2-2 `)kxFD_bH
* @version 1.0 HG)$W
*/ ^5)=)xVF
public class ImprovedMergeSort implements SortUtil.Sort { /8u}VYE
brK7|&R<
private static final int THRESHOLD = 10; t3*.Bm:^
wa!z:}]
/* ulk/I-y
* (non-Javadoc) y3bL\d1
* /XNC^!z6Js
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?kRx;S+
*/ n0t+xvNDF_
public void sort(int[] data) { N7GZ'-t^Er
int[] temp=new int[data.length]; 'j?H>'t{
mergeSort(data,temp,0,data.length-1); 4QYStDFe
} A<(Fn_&W
"*S_wN%
private void mergeSort(int[] data, int[] temp, int l, int r) { {DE4PE`
int i, j, k; uz:r'+v
int mid = (l + r) / 2; :*R+ee,&-
if (l == r) di]CYLf
return; I]cZcx,<q
if ((mid - l) >= THRESHOLD) ZTj!ti;5
mergeSort(data, temp, l, mid); L+mHeS l
else .Q{VY]B^
insertSort(data, l, mid - l + 1); F3 g$b,RMH
if ((r - mid) > THRESHOLD) F^lau f
mergeSort(data, temp, mid + 1, r); .&Sjazk0XO
else P%d3fFzK
insertSort(data, mid + 1, r - mid); 8|u8J0^
#WE lL2&
for (i = l; i <= mid; i++) { #%/Jr 52<
temp = data; Gs4t6+Al
} ) bd`U
for (j = 1; j <= r - mid; j++) { ;Y`8Ee4vH
temp[r - j + 1] = data[j + mid]; 2+K-I
} tiRi_
int a = temp[l]; 5kHU'D
int b = temp[r]; &#9HV
for (i = l, j = r, k = l; k <= r; k++) { tItI^]w2s
if (a < b) { DweF8c
data[k] = temp[i++]; 76u\#{5
a = temp; x4`|[
} else { O7J V{'?
data[k] = temp[j--]; <2LUq@Pg
b = temp[j]; z)R\WFBW
} l{\k\Q!4
} R[#B|$
} +JB*1dz>8
BDX>J3h
/** Y+EwBg)co
* @param data &$h#9
* @param l }kJ9<h,
* @param i DT#Z6A
*/ u2Qs}FX
private void insertSort(int[] data, int start, int len) { 3S1`av(tD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |n.ydyu`
} 2N_9S?a3sK
} Px"K5c*
} x8*@<]!
} +PkN~m`
4$b9<:M_
堆排序： BGVy \F<
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package org.rut.util.algorithm.support; lpeo^Y}N
JZrUl^8E
import org.rut.util.algorithm.SortUtil; 7S9Q{
;V3d"@R,
/** .[#bOp*
* @author treeroot We*c_;@<
* @since 2006-2-2 BXo9s~5Q
* @version 1.0 Yg14aKZl
*/ $Uxg$pqO
public class HeapSort implements SortUtil.Sort{ JSm3ZP|GqJ
B 9AE*
/* (non-Javadoc) pvJPMx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4Vi&Y')f
*/ H@WQO]PA
public void sort(int[] data) { >jDx-H.N
MaxHeap h=new MaxHeap(); Yhd|1,m9f
h.init(data); T3 k#6N.
for(int i=0;i h.remove(); 0,`$KbV\
System.arraycopy(h.queue,1,data,0,data.length); lb('=]3 }H
} k)R>5?_
&vp0zYd+v
private static class MaxHeap{ >zDnJb&"&
>h m<$3
void init(int[] data){ 4';tMiz
this.queue=new int[data.length+1]; sIJ37;ZA
for(int i=0;i queue[++size]=data; g#ONtY@*U
fixUp(size); 6Pa jBEF
} /aB9pD+%
} C&'Y@GE5
(8(z42
private int size=0; +>5 "fs$Y
[Pt5c6L:
private int[] queue; 'HV}Tr
b#C"rTw
public int get() { ]X)EO49
return queue[1]; /vB%gqJvX
} 9bT,=b;
z {J1pH_X
public void remove() { ^ffh
SortUtil.swap(queue,1,size--); FBPT@`~v
fixDown(1); &~Q ?k
} O"mU#3?
file://fixdown P + nT%
private void fixDown(int k) { "t"=9:_t
int j; @]HV:7<q
while ((j = k << 1) <= size) { |[TH ~o
if (j < size %26amp;%26amp; queue[j] j++; m-a_<xo
if (queue[k]>queue[j]) file://不用交换 D] 2+<;>`>
break; ^dP@QMly6
SortUtil.swap(queue,j,k); q6{%vd
k = j; +Z[%+x92
} b,G+=&6u
} s/Wg^(&M
private void fixUp(int k) { k>n^QHM
while (k > 1) { 3<msiCP
int j = k >> 1; Pwz^{*u]
if (queue[j]>queue[k]) cuquA ~
break; (s{%XB:K
SortUtil.swap(queue,j,k); cVn7jxf
k = j; sa+:c{
} ( L RX
} $YaL3n
ce=6EYl
} b)w3 G%Xx
&TWO/F+Y
} 7!JoP?!
:eQxdi'
SortUtil： Ed*`d>
JEBo!9
package org.rut.util.algorithm; _I|wp<R
3[aJ=5
import org.rut.util.algorithm.support.BubbleSort; 7X}_yMxc
import org.rut.util.algorithm.support.HeapSort; 0#*\o1r\p
import org.rut.util.algorithm.support.ImprovedMergeSort; +bf%]
import org.rut.util.algorithm.support.ImprovedQuickSort; a9jY^E'|n
import org.rut.util.algorithm.support.InsertSort; ,%nmCetD@
import org.rut.util.algorithm.support.MergeSort; bJB:]vs$
import org.rut.util.algorithm.support.QuickSort; 9R;s;2$.
import org.rut.util.algorithm.support.SelectionSort; ~T4=Id
import org.rut.util.algorithm.support.ShellSort; 4 <]QMA0
&|E2L1
/** "l +Jx|h\
* @author treeroot p-KuCobz]
* @since 2006-2-2 ,}FYY66K
* @version 1.0 qs-:JmA_w
*/ i,yK&*>JJ
public class SortUtil { ir,Zc\C
public final static int INSERT = 1; s.GhquFCrU
public final static int BUBBLE = 2; 6gR=e+
public final static int SELECTION = 3; eEc;w#
public final static int SHELL = 4; @MB;Ez v
public final static int QUICK = 5; 3UN Jj&-`
public final static int IMPROVED_QUICK = 6; A<.Q&4jb
public final static int MERGE = 7; B|GJboQ
public final static int IMPROVED_MERGE = 8; BxZop.zwE(
public final static int HEAP = 9; q75F^AvH
<&L;9fr
public static void sort(int[] data) { J0=`n(48B
sort(data, IMPROVED_QUICK); )uX:f8
} M2zfN ru
private static String[] name={ C,IN+@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T:!sfhrZ~<
}; IYCKF/2o
VhW;=y>}
private static Sort[] impl=new Sort[]{ ;!~;05^iD
new InsertSort(), ~AE034_N
new BubbleSort(), ToMX7xz6
new SelectionSort(), q/B+F%QiMQ
new ShellSort(), &J~S $
new QuickSort(), 5r+0^UAO:J
new ImprovedQuickSort(), FQ-(#[
new MergeSort(), y2qESAZ%k}
new ImprovedMergeSort(), q;>BltU
new HeapSort() Zgg7pL)#c
}; zEhy0LLm
- 5k4vx N}
public static String toString(int algorithm){ yav)mO~QU6
return name[algorithm-1]; 9=kTTFs
} &iGl)dDr
c\]L
public static void sort(int[] data, int algorithm) { U1"t|KW8
impl[algorithm-1].sort(data); ~lF lv+,%
} 4vX]c
ZK ?x_`w
public static interface Sort { ~NcJLU!au
public void sort(int[] data); oOL3O@)w>
} SQ Fey~
2s4=%l
public static void swap(int[] data, int i, int j) { K?;p:
int temp = data; ;OPCBdr
data = data[j]; 6m.Ku13;
data[j] = temp; w7Pe<vT
} y="SzPl
} 8x9kF]=