[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; bI6wE'h
} <SdJM1%Qo
int i1=l; .eB"la|d
int i2=mid+1; {eN{Zh5"
for(int cur=l;cur<=r;cur++){ =2]rA
if(i1==mid+1) VQjFEJ
data[cur]=temp[i2++]; #'J7Wy
else if(i2>r) C+m^Z[
data[cur]=temp[i1++]; f?^Oy!1]
else if(temp[i1] data[cur]=temp[i1++]; y"p-8RVk{
else B\>}X_\4
data[cur]=temp[i2++]; l'".}6S
} 42wC."A
} >E ;o"
edk9Qd9
} 8;f<qu|w
o\;"|O}
改进后的归并排序: N<"6=z@w+
RdvTtXg
package org.rut.util.algorithm.support; 6ri?y=-c
tSc>@Q_|
import org.rut.util.algorithm.SortUtil; <ZC^H
'# IuY
/** !XA%[u
* @author treeroot p2DNbY\]
* @since 2006-2-2 as|c`4r\O
* @version 1.0 Y1aF._Z
*/ `=$jc4@J
public class ImprovedMergeSort implements SortUtil.Sort { hIo S#]
^npS==Y]!.
private static final int THRESHOLD = 10; :F w"u4WI
fZ~kw*0*
/* .P:f
* (non-Javadoc) 2n;;Tso"
* \{=`F`oB=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m<,G:?RM
*/ 3et2\wOX1x
public void sort(int[] data) { V&j.>Y
int[] temp=new int[data.length]; S]%U]
mergeSort(data,temp,0,data.length-1); Dw/Gha/
} ;E? hz
|U$de2LF
private void mergeSort(int[] data, int[] temp, int l, int r) { *5_8\7d
int i, j, k; y_4krY|Zx
int mid = (l + r) / 2; Nw>T$RzS
if (l == r) Nk7eiQ
return; VO;UV$$
if ((mid - l) >= THRESHOLD) |]!Ky[P
mergeSort(data, temp, l, mid); $x_52 j\j
else LVFsd6:h
insertSort(data, l, mid - l + 1); BOiz ~h6
if ((r - mid) > THRESHOLD) dMs39j
mergeSort(data, temp, mid + 1, r); +V+*7s%fL
else r~G]2*3
insertSort(data, mid + 1, r - mid); eo*u(@
6n6VEwYj
for (i = l; i <= mid; i++) { p1VahjRE-
temp = data; 1s}NQ3
} CX ]\Q-y
for (j = 1; j <= r - mid; j++) { 2HK
temp[r - j + 1] = data[j + mid]; kGuk -P
} R4~zL!7;
int a = temp[l]; Wt)SdF=U/
int b = temp[r]; ZH$sMh<xg
for (i = l, j = r, k = l; k <= r; k++) { ZOrTbik
if (a < b) { @U /3iDB\
data[k] = temp[i++]; 3+8"
a = temp; kulQR>u
} else { ZYA.1VrM
data[k] = temp[j--]; ]D) 'I`
b = temp[j]; m!#)JFe67
} M$]O=2h+2
} Neo^C_[vN
} rv%ye H
x#j\"$dla
/** Msa6yD#
* @param data 4j/iG\
* @param l !G"9xrr1
* @param i bhqq
*/ ~ S?-{X+
private void insertSort(int[] data, int start, int len) { h\u0{!@}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qzHqj;
} .KU SNrs'
} n:bB$Ai2
} Zu0;/_rN
} l@tyg7CwY
MCi`TXr
堆排序： ^0s\/qyqm
@`kiEg'Q
package org.rut.util.algorithm.support; +i`Q 7+d
:<t{ =0G
import org.rut.util.algorithm.SortUtil; 8G5)o`
Nr]8P/[~
/** )pZekh]v
* @author treeroot te\h?H
* @since 2006-2-2 7dlKdKH
* @version 1.0 C'8!cPFVv
*/ EOBs}M;
public class HeapSort implements SortUtil.Sort{ jI{~s]Q
E/dO7I`B
/* (non-Javadoc) g* \P6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yt/SnF
*/ ,\S pjE
public void sort(int[] data) { 0 .FHdJ<
MaxHeap h=new MaxHeap(); 1~R$$P11[9
h.init(data); R*Xu(89
for(int i=0;i h.remove(); 0tW<LR-}E
System.arraycopy(h.queue,1,data,0,data.length); Pn+IJ=0Y
} &'huS?gA9
J~iOP
private static class MaxHeap{ W8G9rB|T
MS st
void init(int[] data){ b@2Cll#
this.queue=new int[data.length+1]; C?w<$DU
for(int i=0;i queue[++size]=data; &$b\=
fixUp(size); TDAWI_83-
} .B 85!lCF
} P>{US1t
42V,PH6o
private int size=0; dq YDz
&& DD
private int[] queue; e' U"`)S
"xDx/d8B
public int get() { $>'")7z
return queue[1]; 2<[eD`u
} SLJ&{`"7
9@#h}E1$
public void remove() { S(>@:`=
SortUtil.swap(queue,1,size--); })o~E
fixDown(1); q:Y6fbt<7
} CYPazOfj
file://fixdown 2ec$xms
private void fixDown(int k) { t_I\P.aMA
int j; 1jH7<%y
while ((j = k << 1) <= size) { 6WE&((r^
if (j < size %26amp;%26amp; queue[j] j++; ^s^JzFw
if (queue[k]>queue[j]) file://不用交换 2gd<8a''
break; 861i3OXVE>
SortUtil.swap(queue,j,k); o%Be0~n'
k = j; Qy=HrL]x
} \Y!T>nWn)I
} lX98"}
private void fixUp(int k) { ]a$Wxvgq
while (k > 1) { [F/^J|VMV
int j = k >> 1; ;dqk@@O"(
if (queue[j]>queue[k]) JQ)4}t
break; JkSdLj
SortUtil.swap(queue,j,k); yaH Trh%
k = j; -ajM5S=d*
} IPl@ DH
} SwdC,
I#|ocz
} .q0218l:dF
.O5LI35,
} r-RCe3%g%
*2JH_Cj`
SortUtil： o {=qC:b
I?_E,.)[ I
package org.rut.util.algorithm; eecw]P_?
CY*ngi&
import org.rut.util.algorithm.support.BubbleSort; I86e&"40
import org.rut.util.algorithm.support.HeapSort; 'oz hz2s
import org.rut.util.algorithm.support.ImprovedMergeSort; ^ckj3Y#;
import org.rut.util.algorithm.support.ImprovedQuickSort; Yv)Bj
import org.rut.util.algorithm.support.InsertSort; yWj9EHQU[
import org.rut.util.algorithm.support.MergeSort; 5/& 1Oxo
import org.rut.util.algorithm.support.QuickSort; cQ8dc+ {
import org.rut.util.algorithm.support.SelectionSort; UI!6aVL.
import org.rut.util.algorithm.support.ShellSort; _Ry_K3K
%&^Q(f
/** R<f#r03@|
* @author treeroot 1&"-*)
* @since 2006-2-2 %ZujCZn
* @version 1.0 x}tKewdOSe
*/ <jbj/Q )"
public class SortUtil { Wgxn`6
public final static int INSERT = 1; /Zo~1q
public final static int BUBBLE = 2; P3'2IzNw
public final static int SELECTION = 3; +"]oc{W!
public final static int SHELL = 4; Zxg1M
public final static int QUICK = 5; `kv1@aQPL
public final static int IMPROVED_QUICK = 6; SHMl%mw
public final static int MERGE = 7; :e1'o
public final static int IMPROVED_MERGE = 8; ^9&b+u=X
public final static int HEAP = 9; Da"yZ\4
nIfN"
public static void sort(int[] data) { 'UY[ap
sort(data, IMPROVED_QUICK); ]EB6+x!G
} 12idM*
private static String[] name={ ;aq`N}d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vG Y!4@[
}; Y4QLs^IdB
>@^<S_KVh
private static Sort[] impl=new Sort[]{ N<9w{zIK(
new InsertSort(), "Dyym<J
new BubbleSort(), @ru<4`h
new SelectionSort(), $Axng J c
new ShellSort(), <5dH *K
new QuickSort(), x+4vss
new ImprovedQuickSort(), iJ}2"i7M
new MergeSort(), 2=>*O
new ImprovedMergeSort(), XZ}de%U1
new HeapSort() m7JPH7P@BM
}; h~ $&
K} +S+ *_
public static String toString(int algorithm){ 5N\+@grp
return name[algorithm-1]; 8KFj<N>'
} {={^6@
/T,zZ9=
public static void sort(int[] data, int algorithm) { zVdKYs i^
impl[algorithm-1].sort(data); VsEGX@;tO
} x8Q~VVZr
l$F_"o?&S@
public static interface Sort { l{8CISO*
public void sort(int[] data); SaCx)8ul0
} AWO0NWTB
PC|'yAN:
public static void swap(int[] data, int i, int j) { C5Xof|#p|
int temp = data; h%' N hV
data = data[j]; ?4,@, ae&
data[j] = temp; 5? Wg%@
} cST\~SUm
} ~]&B>q