[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; lt08 E2p9
} ^%ZbjJ7|j
int i1=l; dyWj+N5(
int i2=mid+1; q>|&u
for(int cur=l;cur<=r;cur++){ NH9"89]E
if(i1==mid+1) 3MX&%_wUhB
data[cur]=temp[i2++]; WN#S%G:Q)
else if(i2>r) U/}YpLgdD
data[cur]=temp[i1++]; 8uAA6h+
else if(temp[i1] data[cur]=temp[i1++]; =Ot|d #_
else L7\V^f%yCm
data[cur]=temp[i2++]; Rtpk_ND!
} 9U&~H*Hf
} RK)1@Tz7!
<ks+JkW_
} P^[eTR*?
pLj[b4p9
改进后的归并排序: *I]/ [d
+2xgMN6B@
package org.rut.util.algorithm.support; g$f+X~Q
R*0]*\C z
import org.rut.util.algorithm.SortUtil; .w,$ TezGP
"`Q&s
/** {,aX|*1Ku~
* @author treeroot ~(*2:9*0
* @since 2006-2-2 EDAtC
* @version 1.0 Op()`x m
*/ ?}g^/g !
public class ImprovedMergeSort implements SortUtil.Sort { q7z`oK5
:3b.`s(M
private static final int THRESHOLD = 10; boS=
Th_PmkvC
/* B@w/wH
* (non-Javadoc) 2$r8^}Nj?
* G+7#!y Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |P0!dt7sQ
*/ 0\zY?UUww
public void sort(int[] data) { )DB\du
int[] temp=new int[data.length]; "w&IO}j;=
mergeSort(data,temp,0,data.length-1); Oh# z zo
} a\-AGG{2/X
~Y/:]&wF
private void mergeSort(int[] data, int[] temp, int l, int r) { OEw#;l4 C
int i, j, k; |PtfG2Ty?
int mid = (l + r) / 2; %lq[,6?>5
if (l == r) [s4|+
return; tn{YIp
if ((mid - l) >= THRESHOLD) m^%@bu,
mergeSort(data, temp, l, mid); bog3=Ig-
else 3_bqDhVI5
insertSort(data, l, mid - l + 1); y0f:N U
if ((r - mid) > THRESHOLD) R_W6}
mergeSort(data, temp, mid + 1, r); t)|~8xpP
else j)ME%17
insertSort(data, mid + 1, r - mid); JR_%v=n~x
: &bJMzB
for (i = l; i <= mid; i++) { `^ZhxFX
temp = data; EDT9O
} O!!N@Q2g
for (j = 1; j <= r - mid; j++) { j*\oK@
temp[r - j + 1] = data[j + mid]; 40%fOu,u`
} [*C%u_h
int a = temp[l]; WD55(
int b = temp[r]; /:tzSKq}
for (i = l, j = r, k = l; k <= r; k++) { fUMjLA|*I<
if (a < b) { }W)b
data[k] = temp[i++]; f$76p!pDa
a = temp; Vy=P*
} else { 3n,jrX75u
data[k] = temp[j--]; FI,K 0sO/|
b = temp[j]; |k$6"dXSO
} P!Brw72
} Q5c3C&$6
} /!?b&N/d)
!RP0W
/** \o*w#e[M
* @param data qjObu\r
* @param l ~R&rQJJeJ
* @param i :.9Y
*/ U&i#cF
private void insertSort(int[] data, int start, int len) { Z`_x|cU?J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Lk)I;;
} C$p012D1
} L;lu)|b"
} i?ZVVE=r
} z3Yi$*q <
5dGfO:Dy_
堆排序： 9wlp AK
-T}r$A
package org.rut.util.algorithm.support; )DmydyQ'
yAAV,?:o[
import org.rut.util.algorithm.SortUtil; 5o0n4W
7t+d+sQ-l
/** mPU}]1*p
* @author treeroot Zs(BViTb|
* @since 2006-2-2 IsmZEVuC
* @version 1.0 hraR:l D
*/ v%$l(
public class HeapSort implements SortUtil.Sort{ OK)>QGl
wz1nV}
/* (non-Javadoc) -oUGmV_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E mg=,
*/ tm/=Oc1p
public void sort(int[] data) { ,4S[<(T"
MaxHeap h=new MaxHeap(); t>Ye*eR*`U
h.init(data); ?N<,;~
for(int i=0;i h.remove(); 4[i 3ckFT,
System.arraycopy(h.queue,1,data,0,data.length); XD?Lu _.
} {+zG.1o^
#]dq^B~~
private static class MaxHeap{ oP`:NCj\9
<THwl/a
void init(int[] data){ 6fo\z2
this.queue=new int[data.length+1]; @ R[K8
for(int i=0;i queue[++size]=data; ~n8UN<
fixUp(size); #1%ahPhR+
} FShUw+y
} A@Q6}ESD
Td,d9M
private int size=0; 4qQE9fxdY
s>:gL,%c
private int[] queue; /Yb8= eM
tmOy"mq67
public int get() { !KJA)znx;(
return queue[1]; `v@Z|rv,
} X&HYWH'@,
-. o,bg
public void remove() { Rz&`L8Bz
SortUtil.swap(queue,1,size--); Zr1"'+-
fixDown(1); :1Nc6G
} etT9}RbQ
file://fixdown \?oT.z5VG&
private void fixDown(int k) { z Ohv>a
int j; 71@kIJI
while ((j = k << 1) <= size) { CcW3o"=4
if (j < size %26amp;%26amp; queue[j] j++; c0Bqm
if (queue[k]>queue[j]) file://不用交换 2<9K}Of
break; z{&Av
SortUtil.swap(queue,j,k); ZJW8S
k = j; uB^"A ;0v
} %19~9Tw
} pdm(7^
private void fixUp(int k) { ,}\LC;31,
while (k > 1) { ^SsdM#E
int j = k >> 1; 4lR+nmAZ
if (queue[j]>queue[k]) .71ZeLv*
break; *#E_KW1RV
SortUtil.swap(queue,j,k); [Rub
k = j; 4i.&geXA.
} @54$IhhT~
} n_4.`vs
M*bsA/Z
} j94~cYV
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} +,,dsL
xOPQ~J|z
SortUtil： ;~DrsQb
GApvRR+Z
package org.rut.util.algorithm; c7{s'ifG
n-SO201[*
import org.rut.util.algorithm.support.BubbleSort; BriL^]
import org.rut.util.algorithm.support.HeapSort; /k?l%AH
import org.rut.util.algorithm.support.ImprovedMergeSort; H{yBDxw
import org.rut.util.algorithm.support.ImprovedQuickSort; "!(@MfjT
import org.rut.util.algorithm.support.InsertSort; lz6CK
import org.rut.util.algorithm.support.MergeSort; n|?sNM<J3
import org.rut.util.algorithm.support.QuickSort; zRmVV}b
import org.rut.util.algorithm.support.SelectionSort; =$+0p3[r
import org.rut.util.algorithm.support.ShellSort; wl%ysM|x
m' S{P:TK
/** % >a /m.$
* @author treeroot y`8U0TE3R
* @since 2006-2-2 :R=7dH~r
* @version 1.0 ]hy@5Jyh
*/ +|b#|>6
public class SortUtil { 6w? GeJ
public final static int INSERT = 1; 'hPW#*#W<
public final static int BUBBLE = 2; ~:k r;n2
public final static int SELECTION = 3; )7!,_r
public final static int SHELL = 4; %QrOEs
public final static int QUICK = 5; ^!C
public final static int IMPROVED_QUICK = 6; x^c,cV+*
public final static int MERGE = 7; c%O97J.5b
public final static int IMPROVED_MERGE = 8; aCH;l~+U
public final static int HEAP = 9; c$)>$&([
!( +M
public static void sort(int[] data) { ]mi\Y"RO
sort(data, IMPROVED_QUICK); cAGM|%
} ^`M%g2x
private static String[] name={ 6HJsIeQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;nL7Hizo,
}; L4T\mP7D7*
|A,.mOT
private static Sort[] impl=new Sort[]{ Jw}&[
new InsertSort(), fQ"Vx!
new BubbleSort(), 0}`.Z03fy
new SelectionSort(), [_`yy
new ShellSort(), !-n*]C
new QuickSort(), : O@(Sv
new ImprovedQuickSort(), 1c@S[y
new MergeSort(), h4itXJy52B
new ImprovedMergeSort(), 5(\/ b<#
new HeapSort() 'AWWdz
}; zt9A-% \R
9=6BQ`u
public static String toString(int algorithm){ UroC8Tm
return name[algorithm-1]; 2"|7 YI
} #@w/S:KbJt
pYm#iz
public static void sort(int[] data, int algorithm) { 7O%^4D
impl[algorithm-1].sort(data); ooB9iNo^
} =`>ei
6:8Nz
public static interface Sort { jj;TS%
public void sort(int[] data); %Qb}z@>fJk
} "x.iD,>k
kI04<!
public static void swap(int[] data, int i, int j) { Het>G{
int temp = data; 6C<GYzzo
data = data[j]; %XBTN
data[j] = temp; N"RPCd_
} ollVg/z
} !mWm@}Ujg