[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; ^Pah\p4bj
} +~=j3U
int i1=l; 4P"XT
int i2=mid+1; itg"dGDk
for(int cur=l;cur<=r;cur++){ C XNYWx
if(i1==mid+1) 3E0C$vKM
data[cur]=temp[i2++]; Z{/GT7 /
else if(i2>r) 8n:N#4Dh^
data[cur]=temp[i1++]; 0JKTwLhC
else if(temp[i1] data[cur]=temp[i1++]; i52JY&N
else jfVw{\l
data[cur]=temp[i2++]; sk*vmxClY
} i|xz
} `sgW0Uf
nwzyL`kF
} ))nTd=
oKH+Q6S:
改进后的归并排序: dpX Fx"4A
ru~!;xT
package org.rut.util.algorithm.support; bAy\Sr #/
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import org.rut.util.algorithm.SortUtil; mD|Q+~=|e
dK0H.|
/** _'<FBlIN
* @author treeroot e{3%-
* @since 2006-2-2 vF&0I2T~l
* @version 1.0 B79~-,Yh
*/ - P"
public class ImprovedMergeSort implements SortUtil.Sort { YLS*uXB&.
$My~sN8
private static final int THRESHOLD = 10; t*dq*(3"c
PS=q):R|
/* rQJ\Y3.
* (non-Javadoc) f0R+Mz8{
* V-E 77u6{0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S<-5<Pg
*/ 9}L2$^#,NA
public void sort(int[] data) { 3}fhU{-c
int[] temp=new int[data.length]; G}LV"0?
mergeSort(data,temp,0,data.length-1); b|;h$otC
} NqveL<r`
{B e9$$W,
private void mergeSort(int[] data, int[] temp, int l, int r) { RKM5FXX
int i, j, k; 3(nnN[?N,5
int mid = (l + r) / 2; JT=ax/%Mo
if (l == r) =-&h@mB;G
return; l|iOdKr h
if ((mid - l) >= THRESHOLD) >_G'o
mergeSort(data, temp, l, mid); 2E`mbT,v&
else =''b`T$
insertSort(data, l, mid - l + 1); {oR@'^N
if ((r - mid) > THRESHOLD) `M(st%@n
mergeSort(data, temp, mid + 1, r); !w@i,zqu
else h%NM%;"H/
insertSort(data, mid + 1, r - mid); jw 5 U-zi
HLdHyK/S
for (i = l; i <= mid; i++) { nJ/}b/A{
temp = data; rl&.|;5uH;
} )4.-6F7U?
for (j = 1; j <= r - mid; j++) { ^FVmP d*1
temp[r - j + 1] = data[j + mid]; N2Ysi$
} MJCz %zK
int a = temp[l]; ZLdIEBi=
int b = temp[r]; uu"hu||0_
for (i = l, j = r, k = l; k <= r; k++) { jSRi
if (a < b) { @1<VvW=
data[k] = temp[i++]; 3+vVdvu%
a = temp; rvK%m_r
} else { 8j :=D!S
data[k] = temp[j--]; CS5[E-%}T=
b = temp[j]; -WR<tkK
} 2;J\Z=7
} 6V}xgfB
} EJQT\c
SJlE!MK
/** +_u~Np
* @param data ^4'!B +}F
* @param l Fs(S!;
* @param i "dE[X` }=
*/ )qOcx I
private void insertSort(int[] data, int start, int len) { H SGz-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,A)Z.OWOq
} ET 0(/Zz
} -YmIRocx
} 2JcP4!RD
} 3 `mtc@*
>,I'S2_Zl
堆排序： #6l(2d
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package org.rut.util.algorithm.support; M%W#0
7s!rer>
import org.rut.util.algorithm.SortUtil; AT1{D!b
;:+2.//
/** n}fV$qu
* @author treeroot yy&L&v'
* @since 2006-2-2 K5\l (BB
* @version 1.0 UO!} 0'
*/ e$JCak=
public class HeapSort implements SortUtil.Sort{ zr_L V_e
&A`,hF8
/* (non-Javadoc) Y(2Z<d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jf\`?g3#
*/ (0.JoeA`y
public void sort(int[] data) { R*XZPzg%
MaxHeap h=new MaxHeap(); yF%e)6
h.init(data); Q<ia
for(int i=0;i h.remove(); E*fa&G~s )
System.arraycopy(h.queue,1,data,0,data.length); Kp1 F"!
} q^n LC6q
;Ru[^p.{
private static class MaxHeap{ Q&_#R(3j;
>l/pwb@
void init(int[] data){ 6A}tA$*s7
this.queue=new int[data.length+1]; JnIG;/
for(int i=0;i queue[++size]=data; inZ0iU9dy
fixUp(size); moh,aB#
} Kv<mDA!
} Y6d~hLC
v\qyDZVV
private int size=0; fX6pW%Q'6
m\bmBK"I
private int[] queue; H{Lt,#
f5l\3oL
public int get() { [p}~M-$V8Y
return queue[1]; e"XolM0IM
} Wm5[+z|2?9
</?ef&
public void remove() { 8G|?R#&
SortUtil.swap(queue,1,size--); m({q<&]Qp
fixDown(1); q;IuV&B
} CdPQhv)m
file://fixdown D%c^j9' 1
private void fixDown(int k) { UQ7La 7"
int j; n<<arO"cv
while ((j = k << 1) <= size) { ?~#[cx
if (j < size %26amp;%26amp; queue[j] j++; Z7[S698
if (queue[k]>queue[j]) file://不用交换 J^%E$s
break; ^Jdg%U?
SortUtil.swap(queue,j,k); #o9CC)q5G
k = j; ITi#p%
} !|]k2=+I
} ,Mi'NO
private void fixUp(int k) { /BvMNKb$$
while (k > 1) { TcJJ"[0
int j = k >> 1; Qz%q#4Zb
if (queue[j]>queue[k]) ZrA*MN
break; (x.qyYEoI
SortUtil.swap(queue,j,k); Fi\)ka\u
k = j; |ITb1O`_P
} @~N"MsF3
} gTB|IcOs
b`^?nD7
} 8x7TK2r
[;F!\B-
} gm8JxhL
(nuTfmt>
SortUtil： SMRCG"3qwA
@T>^ >
package org.rut.util.algorithm; @,6*yyO
"{H{-`Ni
import org.rut.util.algorithm.support.BubbleSort; 4gdXO
import org.rut.util.algorithm.support.HeapSort; ~|ZAS]
import org.rut.util.algorithm.support.ImprovedMergeSort; ,HmGp
import org.rut.util.algorithm.support.ImprovedQuickSort; ^^tTA^
import org.rut.util.algorithm.support.InsertSort; 3DB= Xh
import org.rut.util.algorithm.support.MergeSort; OT6Te&
import org.rut.util.algorithm.support.QuickSort; 9.( [,J
import org.rut.util.algorithm.support.SelectionSort; zcH"Kh&
import org.rut.util.algorithm.support.ShellSort; R%)F9P$o
^8-,S[az
/** *ezft&{)`
* @author treeroot uGW#z_{(n
* @since 2006-2-2 qD=b+\F
* @version 1.0 CWYOzqf
*/ qt"6~r!
public class SortUtil { Fl{~#]
public final static int INSERT = 1; xy$aFPH!-
public final static int BUBBLE = 2; T?.l_"%%d
public final static int SELECTION = 3; D+jvF
public final static int SHELL = 4; :P+7ti@
public final static int QUICK = 5; f4NN?"W)
public final static int IMPROVED_QUICK = 6; vS3Y9|-:
public final static int MERGE = 7; V$Oj@vI
public final static int IMPROVED_MERGE = 8; U7f o4y1}
public final static int HEAP = 9; _+7P"B|\
mL'A$BR`
public static void sort(int[] data) { QyZ'%T5J
sort(data, IMPROVED_QUICK); XH/!A`ZK
} ]*U; }
private static String[] name={ Q`Pe4CrWvu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +u\w4byl
}; +ek6}f#
1<lfo^B
private static Sort[] impl=new Sort[]{ 2\+N<-(F5
new InsertSort(), 2.v`J=R
new BubbleSort(), $M4_"!
new SelectionSort(), 2_?VR~mA#
new ShellSort(), }XpZgd$
new QuickSort(), ,+gtr.
new ImprovedQuickSort(), K]7[|qf&
new MergeSort(), Qx!Bf_,J
new ImprovedMergeSort(), Y(EF )::
new HeapSort() FJ?]|S.?,
}; <veypLi"R
HTMo.hr
public static String toString(int algorithm){ \Ov~ t
return name[algorithm-1]; c5O8,sT
} kXUJlLod
F*Yx1vj
public static void sort(int[] data, int algorithm) { s+G(N$0U
impl[algorithm-1].sort(data); dpt P(H
} ZGCp[2$
oq1wU@n
public static interface Sort { l-h[I>TW
public void sort(int[] data); cP@H8|c=
} fmUrwI1 %
^r7KEeVD
public static void swap(int[] data, int i, int j) { .i` -t"
int temp = data; %P#| }
data = data[j]; a8k`Wog
data[j] = temp; {cdrMP@""
} }20tdD ~
} 2@HmZ!|Q