[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; yG Wnod'
} pv^O"Bs
int i1=l; /Uo y/}!
int i2=mid+1; "4vy lHIo
for(int cur=l;cur<=r;cur++){ Dfq(Iv
if(i1==mid+1) ;<G=M2
data[cur]=temp[i2++]; T3`ludm^u
else if(i2>r) tmqY2.
data[cur]=temp[i1++]; nqwAQhzy(
else if(temp[i1] data[cur]=temp[i1++]; 6s0_#wZC
else ~"UV]Udn
data[cur]=temp[i2++]; (JM4R8fR&
} %tG*C,l]
} It2" x;
)M__ t5L
} .U T@p
8]&i-VFof
改进后的归并排序: Q{B}ef
+cD!1IT:
package org.rut.util.algorithm.support; 6N)!aT9eo
3O7!`Nm@
import org.rut.util.algorithm.SortUtil; 7^w >Rj
NPFpq,P>
/** vN3Zr34
* @author treeroot wdUBg*X8
* @since 2006-2-2 ,t\* ZTt$
* @version 1.0 5) -~mWy
*/ pp7$J2s+j
public class ImprovedMergeSort implements SortUtil.Sort { ^pJ!isuqu
`7/Y@}n
private static final int THRESHOLD = 10; ChCrL[2
pv&y91
/* sZW^!z
* (non-Javadoc) oh$Q6G
* LBF 1;zjK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `'V4PUe
*/ XS$OyW_Q
public void sort(int[] data) { X^WrccNX
int[] temp=new int[data.length]; 7"8hC
mergeSort(data,temp,0,data.length-1); +[5.WC7J
} I4&::y^C
>Wz;ySEz
private void mergeSort(int[] data, int[] temp, int l, int r) { msVOH%wH
int i, j, k; LVJxn2x6
int mid = (l + r) / 2; sJ]taY ou
if (l == r) ;A#`]-i C
return; [,TkFbDq"J
if ((mid - l) >= THRESHOLD) JwJ7=P=c
mergeSort(data, temp, l, mid); PssMTEf
else 7EXI6jGJ|
insertSort(data, l, mid - l + 1); )c8j}
if ((r - mid) > THRESHOLD) otk}y8
mergeSort(data, temp, mid + 1, r); U#3J0+!
else sP ls zC[
insertSort(data, mid + 1, r - mid); -%L6#4m4o
1x[)/@.'f
for (i = l; i <= mid; i++) { }[M`uZ
temp = data; :UQTEdc{
} RIIitgV_
for (j = 1; j <= r - mid; j++) { g55`A`5%C
temp[r - j + 1] = data[j + mid]; h[PYP5{L
} +wkjS r`e
int a = temp[l]; +zy=50,
int b = temp[r]; D}vmwg@3
for (i = l, j = r, k = l; k <= r; k++) { gB<3-J1R
if (a < b) { 9Lr'YRl[W
data[k] = temp[i++]; `3:.??7N
a = temp; sqW* pi
} else { %Qj;,#z
data[k] = temp[j--]; %Q.&ZhB
b = temp[j]; ZcaX'5}!S
} F+@5C:<?
} t*?0D\b 2
} %JLk$sP9y`
yrR1[aT
/** !%c'$f/
* @param data .-<k>9S7_
* @param l IKi5 v~bE
* @param i B9wPU1
*/ 8cA~R-
private void insertSort(int[] data, int start, int len) { aXL{TD:]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {RF-sqce
} &B|D;|7H
} zD<or&6
} )HvnoUO0
} d'Zqaaf k%
;INW`b~
堆排序： AZmb!}m+d
435;Vns\n
package org.rut.util.algorithm.support; 9ksE>[7
2Y7)WPn
import org.rut.util.algorithm.SortUtil; +=:#wzK@
Z.M,NR
/** lv]hTH 4T
* @author treeroot Op_RzZP`
* @since 2006-2-2 H=\3Jj(4
* @version 1.0 I}t#%/'YA
*/ }X=[WCKU
public class HeapSort implements SortUtil.Sort{ IV)<5'v
Pcw6!xH
/* (non-Javadoc) LGl2$#x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (<)]sp2
*/ AhNq/?Q Q~
public void sort(int[] data) { LA`*_|}qcR
MaxHeap h=new MaxHeap(); ak;*W
h.init(data); A]DTUdL
for(int i=0;i h.remove(); 0$-xw
System.arraycopy(h.queue,1,data,0,data.length); HvVts\f
} fXcm|U,ho
Lliqj1&
private static class MaxHeap{ N"3b{Qio
$ >EYhLBa
void init(int[] data){ MX@_=Sp-
this.queue=new int[data.length+1]; l~M_S<4n
for(int i=0;i queue[++size]=data; A7n\h-b
fixUp(size); CXC`sPY
} f{FDuIln
} 8)4P Ll
o";Z$tAJkC
private int size=0; zF`c8Tsx])
rf$X>M=G
private int[] queue; rp0ZvEX
d`F&aC
public int get() { ? 8LXP
return queue[1]; 4vwTs*eB`
} et }T%~T
[AW" D3
public void remove() { rW0FA
SortUtil.swap(queue,1,size--); kbMYMx.[
fixDown(1); DrO2y
} ?!`=X>5
file://fixdown s%W<dDINl
private void fixDown(int k) { sx`O8t
int j; QV&D l_
while ((j = k << 1) <= size) { 67VT\f
if (j < size %26amp;%26amp; queue[j] j++; di>cMS 4 c
if (queue[k]>queue[j]) file://不用交换 L*~J%7
break; xa pq*oj
SortUtil.swap(queue,j,k); 1Tm^
k = j; T16{_
} /,!B2
} jb^N|zb
private void fixUp(int k) { oDU ;E
while (k > 1) { g2T -TG'd
int j = k >> 1; [!U?}1YQ
if (queue[j]>queue[k]) .;*s`t
break; - h9?1vc7
SortUtil.swap(queue,j,k); .3MIcj=p
k = j; ,Y>Bex_v
} ,.qMEMm
} r9ww.PpNk#
f?'JAC*
} k+DR]icv
'FS?a
} :M6+p'`j
uIDuGrt
SortUtil： G3{=@Z1
1rDqa(7
package org.rut.util.algorithm; =%>oR
NwZ@#D#[ Y
import org.rut.util.algorithm.support.BubbleSort; (bh95X
import org.rut.util.algorithm.support.HeapSort; pf_mf.
import org.rut.util.algorithm.support.ImprovedMergeSort; T.qNCJmB
import org.rut.util.algorithm.support.ImprovedQuickSort; npNB{J[
import org.rut.util.algorithm.support.InsertSort; /*c\qXA5
import org.rut.util.algorithm.support.MergeSort; as>L[jyG/
import org.rut.util.algorithm.support.QuickSort; C,.Ee3T
import org.rut.util.algorithm.support.SelectionSort; *Otg*,\
import org.rut.util.algorithm.support.ShellSort; mI>,.&eo
]TyisaT
/** &JtV'@>v
* @author treeroot ^tCd L@$AS
* @since 2006-2-2 78/N
* @version 1.0 *>+,(1Fz
*/ E_bO9nRHV
public class SortUtil { Y "VY%S^
public final static int INSERT = 1; {U_$&f9s
public final static int BUBBLE = 2; z$kenhFG/
public final static int SELECTION = 3; J:kmqk!
public final static int SHELL = 4; Yp:KI7
public final static int QUICK = 5; ($~RoQ=0S
public final static int IMPROVED_QUICK = 6; Y)}Rb6qGW
public final static int MERGE = 7; s$a09x
public final static int IMPROVED_MERGE = 8; iIP8`! O
public final static int HEAP = 9; l}lIi8
g{P%s'%*
public static void sort(int[] data) { P8?Fm`
sort(data, IMPROVED_QUICK); pm9%%M$
} gB4U*D0[e~
private static String[] name={ V}zEK0n(6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p+Y>F\r&w
}; <dvy"Dx
+ Q6l*:<|c
private static Sort[] impl=new Sort[]{ Zw~+Pb
new InsertSort(), uy}%0vLo
new BubbleSort(), `3Uj{w/Q:L
new SelectionSort(), yOwA8^q
new ShellSort(), E=#0I]v[
new QuickSort(), %bdjBa}
new ImprovedQuickSort(), "1-}A(X
new MergeSort(), _IdRF5<4
new ImprovedMergeSort(), HWVtop/
new HeapSort() o#hjvg
}; L*x[?x;)@
\2vg{
public static String toString(int algorithm){ nO)X!dp}J
return name[algorithm-1]; =k oSUVO0
} 51QRM32Y
7k(Kq5w.
public static void sort(int[] data, int algorithm) { t&(PN%icD
impl[algorithm-1].sort(data); gy;+_'.j
} :Pv*,qHE
+d%L\^?F
public static interface Sort { oy;K_9\
public void sort(int[] data); =2 *rA'im
} 1\r|g2Z :
9Fr3pRIJ
public static void swap(int[] data, int i, int j) { po}F6m8bX
int temp = data; 6AWKLFMV
data = data[j]; {N#KkYH{"
data[j] = temp; DSj(]U~r
} YQS5P#
} i>joT><B