[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; *Au[{sR
} rd4mAX6@
int i1=l; ;q%V)4
int i2=mid+1; o.KE=zp&z
for(int cur=l;cur<=r;cur++){ !eGUiE=
if(i1==mid+1) ,(&5y:o
data[cur]=temp[i2++]; *|&&3&7
else if(i2>r) Cc!LJ
data[cur]=temp[i1++]; %pr}Xs(-f
else if(temp[i1] data[cur]=temp[i1++]; g2W ZW#a)
else lsRW.h,
data[cur]=temp[i2++]; S]}W+BF3
} HWi: CDgm
} H0Ck%5
/7p1y v
} w.R2' WR
ETtoY<`#
改进后的归并排序: &Vmx<w
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package org.rut.util.algorithm.support; uy oEMT#u
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import org.rut.util.algorithm.SortUtil; Ue2k^a*Ww
C'xWRSDO
/** Q(ec>+oi
* @author treeroot 5u&hp
* @since 2006-2-2 @RFJe$%
* @version 1.0 u13v@<HGc
*/ 4#2iq@s
public class ImprovedMergeSort implements SortUtil.Sort { 5WU?Km
>'2=3L^Q
private static final int THRESHOLD = 10; 7DCu#Y[
WS1$cAD2N
/* iVqXf;eB!5
* (non-Javadoc) ]ppws3*Pa
* {^*D5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f^9ntos|
*/ d}(b!q9
public void sort(int[] data) { fGMuml?[ e
int[] temp=new int[data.length]; `ls^fnJTpf
mergeSort(data,temp,0,data.length-1); )b;}]C
} &U0Y#11Cx
'v'=t<wgl
private void mergeSort(int[] data, int[] temp, int l, int r) { l\1_v7s
int i, j, k; &1,{.:@e
int mid = (l + r) / 2; WiCJhVF3
if (l == r) Q'K[?W|C
return; (ixlFGvEq
if ((mid - l) >= THRESHOLD) TM^.y Y
mergeSort(data, temp, l, mid); +IPMI#n
else Jqgo\r%`
insertSort(data, l, mid - l + 1); 5R/k8UZ
if ((r - mid) > THRESHOLD) (G`O[JF
mergeSort(data, temp, mid + 1, r); fD ?w!7f-1
else Jw)-6WJ!uO
insertSort(data, mid + 1, r - mid); }@Ou]o
<CY<-H
for (i = l; i <= mid; i++) { V}+Ui]ie|I
temp = data; #JW~&;
} 7Hzv-s
for (j = 1; j <= r - mid; j++) { 7=[/J*-m
temp[r - j + 1] = data[j + mid]; R?H[{AX
} &(YNz9L
int a = temp[l]; 5Int,SX
int b = temp[r]; t6a$ZN;
for (i = l, j = r, k = l; k <= r; k++) { && E)
if (a < b) { $J)2E g
data[k] = temp[i++]; u<K{=94!e
a = temp; (=/}i'
} else { wl:[Ad
data[k] = temp[j--]; e{7"7wn=
b = temp[j]; ( t59SY
} GMQKR,6VM
} B{\qYL/~
} gWpG-RL0
ZIikDih1
/** A,#a?O6m
* @param data +o^sm'$
* @param l {2MS,Ua{
* @param i 'NDDj0Y
*/ 31=vUS
private void insertSort(int[] data, int start, int len) { .[8g6:>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u$V8fus0
} 56T{JTo
} 2L|)uCb
} mv\S1[<T
} 9 7Mi{Zz
1JWo~E'
堆排序： ^P}c0}^
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package org.rut.util.algorithm.support; D/]
)ME'qA3K
import org.rut.util.algorithm.SortUtil; .l}oxWWoS
"E}38
/** l"app]uVZ
* @author treeroot SQJ }$#=
* @since 2006-2-2 U<jAZU[L
* @version 1.0 gtlyQ _V
*/ ?)L X4GY
public class HeapSort implements SortUtil.Sort{ ]q CCCI`
^F4h:
/* (non-Javadoc) wH N5H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RI#o9d"x}
*/ t'im\_$F
public void sort(int[] data) { ~5sH`w~vQ
MaxHeap h=new MaxHeap(); c&;Xjy
h.init(data); BNpc-O~
for(int i=0;i h.remove(); :Wl`8p4]
System.arraycopy(h.queue,1,data,0,data.length); rw]7Lr_>
} ;/=6~%
HlC[Nu^6U
private static class MaxHeap{ 6UnWtLE
O(CmdSk,
void init(int[] data){ Bl!R bh\
this.queue=new int[data.length+1]; j=5hW.fI
for(int i=0;i queue[++size]=data; r"\g6<RP
fixUp(size); {u{8QKeC
} jz"-E
} YMD&U
.:V4>
private int size=0; [|{m/`8C
*>8Y/3Y\B
private int[] queue; c3q @]|aI
[2Ot=t6]
public int get() { <`WtP+`
return queue[1]; #8;#)q_[u
} WpPI6bd
".:]?Lvt
public void remove() { URb
SortUtil.swap(queue,1,size--); [&h%T;!Qii
fixDown(1); 1J @43>u{
} :elTqw>pn
file://fixdown 7zEpuw
private void fixDown(int k) { NQqq\h
int j; 0FG|s#Ig
while ((j = k << 1) <= size) { lJ/{.uK
if (j < size %26amp;%26amp; queue[j] j++; h(MS>=
if (queue[k]>queue[j]) file://不用交换 MR-cOPn
break; @1^:V-=
SortUtil.swap(queue,j,k); hsZ}FLStJ
k = j; `6QQS3fk!
} ZKco
} Jl|^
private void fixUp(int k) { fgEMn;
while (k > 1) { ;/|3U7{c
int j = k >> 1; `R{ ZED l'
if (queue[j]>queue[k]) 7$jO3J
break; ):pFI/iC
SortUtil.swap(queue,j,k); Zg~6
k = j; #;~dA
} &RbT&
} |?Bb{Es
aT`. e
} rJqRzF{|P6
8jz[;.jP",
} ]/y69ou
:MbD=sX
SortUtil： QB|D_?]
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package org.rut.util.algorithm; os~}5QJ
KM jnY2
import org.rut.util.algorithm.support.BubbleSort; )'Yoii{dSU
import org.rut.util.algorithm.support.HeapSort; IWD21lS
import org.rut.util.algorithm.support.ImprovedMergeSort; Fl;!'1
import org.rut.util.algorithm.support.ImprovedQuickSort; FST}:*dOe5
import org.rut.util.algorithm.support.InsertSort; nH -1,#`g
import org.rut.util.algorithm.support.MergeSort; oq3{q
import org.rut.util.algorithm.support.QuickSort; =as\Tp#d
import org.rut.util.algorithm.support.SelectionSort; t?404
import org.rut.util.algorithm.support.ShellSort; )o>1=Y`[z
?7CHHk
/** >W7IWhm3
* @author treeroot Wk*t-
* @since 2006-2-2 _E<
* @version 1.0 Z4aK
*/ v'W`\MKY)
public class SortUtil { [*|QA9
public final static int INSERT = 1; H]JVv8
public final static int BUBBLE = 2; #Y'svn1H
public final static int SELECTION = 3; 2*1FW v
public final static int SHELL = 4; D|rcSa.M
public final static int QUICK = 5; <"rckPv_H
public final static int IMPROVED_QUICK = 6; &6}] v:
public final static int MERGE = 7; z~+gche>
public final static int IMPROVED_MERGE = 8; Qpaan
public final static int HEAP = 9; E+|r h-M7
vspub^;5\
public static void sort(int[] data) { 8 y+Nl&"V
sort(data, IMPROVED_QUICK); }j /r
} X=d;WT4,,
private static String[] name={ <<:a>)6\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0nOp'Ky\k
}; =gb(<`{>
[J6b5
private static Sort[] impl=new Sort[]{ 6ISDY>p
new InsertSort(), L.M|o
new BubbleSort(), q\gvX 76a
new SelectionSort(), ZRr S""V
new ShellSort(), ?=X_a{}/
new QuickSort(), maopr$r
new ImprovedQuickSort(), &$ /}HND
new MergeSort(), z`Cq,Sz/
new ImprovedMergeSort(), 1=X"|`<!
new HeapSort() EFKOElG(k
}; 70&]nb6f
*zR
public static String toString(int algorithm){ `*hrU{b
return name[algorithm-1]; ;\gsd'i
} CWk65tcF
b+`mh
public static void sort(int[] data, int algorithm) { >4lT0~V/
impl[algorithm-1].sort(data); _Z|3qQ
} rJ UXA<:2
]A2l%V_7
public static interface Sort { V*U*_Y
public void sort(int[] data); :*wjC.Z
} u/2!v(
s*0PJ\E2
public static void swap(int[] data, int i, int j) { }|7y.*
int temp = data; i`2X[kc
data = data[j]; l[J'FR:
data[j] = temp; z nc'
} T)NnWEB
} "RF<i3{S