[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; oHi&Z$#!n
} `(o1&
int i1=l; c@nl;u)n
int i2=mid+1; X?7$JV-:
for(int cur=l;cur<=r;cur++){ U;V. +onv
if(i1==mid+1) 'pm2C6AC
data[cur]=temp[i2++]; @fE^w^K7
else if(i2>r) cF vGpZ
data[cur]=temp[i1++]; Gh{k~/B
else if(temp[i1] data[cur]=temp[i1++]; ki+9Ln;
else 5&9(d_#H
data[cur]=temp[i2++]; {8B\-LUR
} J$WIF&*0@
} &_90E
>2g CM
} b0t];Gc%b
H8-,gV
改进后的归并排序: 9I.v?Tap
.cZ&~ N
package org.rut.util.algorithm.support; ;_Rx|~!!
09%eaoW
import org.rut.util.algorithm.SortUtil; %74Ms
?pF;{
/** \ I?;%
* @author treeroot zw5~|<
* @since 2006-2-2 Le3S;SY&
* @version 1.0 o$-8V:)6d
*/ v\MH;DW^Z
public class ImprovedMergeSort implements SortUtil.Sort { )E[5lD61
mML^kgy\N
private static final int THRESHOLD = 10; U<6k!Y9ny
IYCKF/2o
/* s)M2Z3>+
* (non-Javadoc) R<U?)8g,h~
* 5W{>5.Arx)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~y|%D;
*/ A|>C3S
public void sort(int[] data) { ~AE034_N
int[] temp=new int[data.length]; EhD|\WLx!
mergeSort(data,temp,0,data.length-1); 2Qy!Aa
} %*19S.=l
h |lQTT
private void mergeSort(int[] data, int[] temp, int l, int r) { Txfb-f!mv\
int i, j, k; Iiy:<c
int mid = (l + r) / 2; ynDx'Q*N'
if (l == r) M5x!84
return; pz$$K?
if ((mid - l) >= THRESHOLD) _N-7H\hF
mergeSort(data, temp, l, mid); v;RQVH;,
else KqS2
insertSort(data, l, mid - l + 1); h?ia4t
if ((r - mid) > THRESHOLD) fFd9D=EW.
mergeSort(data, temp, mid + 1, r); j qdI=!H
else G1nW{vce
insertSort(data, mid + 1, r - mid); E%;'3Qykva
&iGl)dDr
for (i = l; i <= mid; i++) { H]!y |p
temp = data; 9nG] .@H
} $>h#|?*?
for (j = 1; j <= r - mid; j++) { %&]}P;&
temp[r - j + 1] = data[j + mid]; ~lF lv+,%
} & 9]KkY=
int a = temp[l]; t~a$|( 9
int b = temp[r]; ^6LFho4
for (i = l, j = r, k = l; k <= r; k++) { n5JB'F)
if (a < b) { -E500F*b
data[k] = temp[i++]; ,m"ztu-
a = temp; I+CQ,Zuf
} else { xBZ9|2Y s
data[k] = temp[j--]; kCC9U_dj,
b = temp[j]; v|/3Mi9mz
} !:n),sFv45
} 8;!Eqyt
} U.)G#B
!}PFiT^
/** GY",AL8f
* @param data kIfb!
* @param l >C-_Zv<!T\
* @param i c==Oio("
*/ *3ne(c
private void insertSort(int[] data, int start, int len) { L|2COX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dikWk
} Vd/S81/
} p;7 4+q
} kR6 t .
} v\Wm[Ld
j^ _I{
堆排序： 3N bn|_`(
4y1>!~f
package org.rut.util.algorithm.support; }g*-Ty
@*uX[)
import org.rut.util.algorithm.SortUtil; 9V],X=y~
{''|iwLr
/** vaf9b}FL
* @author treeroot YT5>pM-%
* @since 2006-2-2 4'd{H Rs
* @version 1.0 #LN I&5
*/ 5i/E=D
public class HeapSort implements SortUtil.Sort{ -PnC^r0L$
NqZRS>60v
/* (non-Javadoc) $&C(oh$:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IP'igX
*/ @gqw]_W
public void sort(int[] data) { `es($7}P_W
MaxHeap h=new MaxHeap(); @*DIB+K
h.init(data); p-pw*wH0
for(int i=0;i h.remove(); -/-6Td1JY>
System.arraycopy(h.queue,1,data,0,data.length); #8z,'~\
} w}Upa(dU
=_'cG:=)
private static class MaxHeap{ 7RP_ ^Cr+
^c\IZ5
void init(int[] data){ t>wxK ,
this.queue=new int[data.length+1]; Lmwh`oOl
for(int i=0;i queue[++size]=data; ;ULC|7rL
fixUp(size); }91mQ`3
} H<;Fb;b
} *!'&:
mU=6"A0 U
private int size=0; |\a:]SlH
Ib2@Wi
private int[] queue; KCk?)Qv
S(J\<)b
public int get() { x ctU.)p
return queue[1]; Idlu1g
} |sFe:TX
A(n=kx
public void remove() { :6u3Mj{
SortUtil.swap(queue,1,size--); e9W7ke E*
fixDown(1); ` (D4gPW
} O^}v/}d
file://fixdown |mk}@OEf
private void fixDown(int k) { LO]6Xd"
int j; z/KZ[qH\
while ((j = k << 1) <= size) { j#e.rNG
if (j < size %26amp;%26amp; queue[j] j++; #eC;3Kq#-
if (queue[k]>queue[j]) file://不用交换 ;:c%l.Y2
break; 'Y[A'.*}4
SortUtil.swap(queue,j,k); p??/r
k = j; O|Ic[XfLx
} :Nz?<3R0\
} <8)s
private void fixUp(int k) { eFSC^
while (k > 1) { =$8@JF'
int j = k >> 1; [S]!+YBK
if (queue[j]>queue[k]) d=Do@) m|
break; cIr1"5POXK
SortUtil.swap(queue,j,k); wz+5 8(
k = j; 0sd-s~;
} +V9B
} ^ 6.lb\
dPx<Dz;
} ~B!O~nvdQ
z9 w&uZzi
} jRG\C=&(x
kz0=GKic
SortUtil： 2Nn1-wdhb
g?~Tguv
package org.rut.util.algorithm; +oy&OKCa
|WAD $3
import org.rut.util.algorithm.support.BubbleSort; V+qJrZ,i
import org.rut.util.algorithm.support.HeapSort; g6g$nY@Jm
import org.rut.util.algorithm.support.ImprovedMergeSort; hoR=%pC*
import org.rut.util.algorithm.support.ImprovedQuickSort; 3l%,D: ?
import org.rut.util.algorithm.support.InsertSort; M{xVkXc>
import org.rut.util.algorithm.support.MergeSort; @vQa\|j
import org.rut.util.algorithm.support.QuickSort; ahtYSz_FM
import org.rut.util.algorithm.support.SelectionSort; V-_/(xt*
import org.rut.util.algorithm.support.ShellSort; Hl3)R*&'J
3u*hTT
/** UQ3@@:L_
* @author treeroot kwHqvO!G
* @since 2006-2-2 VkpHzr[k
* @version 1.0 b(RBG
*/ 0[lsoYUq
public class SortUtil { gt_XAH
public final static int INSERT = 1; :wU_-{>>2
public final static int BUBBLE = 2; *v rWA
public final static int SELECTION = 3; !\0F.*
public final static int SHELL = 4; fYhR#FVI
public final static int QUICK = 5; poD\C;o"
public final static int IMPROVED_QUICK = 6; ,?k%jcR
public final static int MERGE = 7; 5#0e={X
public final static int IMPROVED_MERGE = 8; Ud#X@xK<h
public final static int HEAP = 9; '_qQrP#
rKzlK 'U
public static void sort(int[] data) { P>Q{He:
sort(data, IMPROVED_QUICK); %l}Q?Z
} 0)AM-/"
private static String[] name={ #%^\\|'z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =4zNo3IvL+
}; vJRnBq+y
W7L+8LU;
private static Sort[] impl=new Sort[]{ 4TUtY:
new InsertSort(), ~o@\ n
new BubbleSort(), H#L#2M%
new SelectionSort(), IyS"
new ShellSort(), -|}%~0)/bH
new QuickSort(), 0/\PZX+
new ImprovedQuickSort(), 't(}Rq@
new MergeSort(), {/d4PI7)tK
new ImprovedMergeSort(), {7?9jEj
new HeapSort() 7]|zkjgI
}; l(%k6
hCM8/Vvx6
public static String toString(int algorithm){ CE#\Roi x)
return name[algorithm-1]; cJ(BiL-uF
} M XZq
fxDj+Q1p
public static void sort(int[] data, int algorithm) { 8xF)_UV
impl[algorithm-1].sort(data); Wp5]Uk
} P8wy*JvT
H`m:X,6}
public static interface Sort { oYz!O]j;a
public void sort(int[] data); tAqA^f*{
} x(PKFn
3ai (x1%
public static void swap(int[] data, int i, int j) { QCOLC2I
int temp = data; ja[OcR-tX
data = data[j]; Vkr`17`G
data[j] = temp; B0oxCc/'sZ
} $PSY:Zz
} Q.,DZp