[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; ^5F/=TtE G
} i>}z$'X
int i1=l; )I9(WVx!]
int i2=mid+1; @x4Dt&:"
for(int cur=l;cur<=r;cur++){ Rl8-a8j$f.
if(i1==mid+1) ~VKXL,.
data[cur]=temp[i2++]; $T0[
else if(i2>r) sP7(1)\
data[cur]=temp[i1++]; 2e=Hjf )
else if(temp[i1] data[cur]=temp[i1++]; $4]PN2d&
else gd*?kXpt
data[cur]=temp[i2++]; WdnP[x9
} ozG:f*{T
} eU0-_3gN_
[5-5tipvWp
} yFqC-t-i
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改进后的归并排序: ~E~J*R Ze
^DOcw@Z6HC
package org.rut.util.algorithm.support; FW,D\51pTP
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import org.rut.util.algorithm.SortUtil; L&%iY7sC`
HVpaVM
/** 6h%(0=^
* @author treeroot CTYkjeej
* @since 2006-2-2 Wi<Fkzj
* @version 1.0 NM]/OKs'H
*/ @So"(^
public class ImprovedMergeSort implements SortUtil.Sort { ~sD'pS
/jAs`"U
private static final int THRESHOLD = 10; T~Cd=s(T"
' r/1+.
/* WDq3K/7\
* (non-Javadoc) -M}iDBJx>#
* AH+J:8k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0Og =H79<
*/ I6_+3}Hm{
public void sort(int[] data) { !/SFEL@_B
int[] temp=new int[data.length]; ;iVyJZI
mergeSort(data,temp,0,data.length-1); Sz&`=x#
} cA kw5}P
;f\0GsA#
private void mergeSort(int[] data, int[] temp, int l, int r) { Qd&j~cG@
int i, j, k; so*7LM?ib>
int mid = (l + r) / 2; '(}BfDP
if (l == r) VTU-'q
return; Rx.0P6s
if ((mid - l) >= THRESHOLD) V'B 6C#jT
mergeSort(data, temp, l, mid); FgxQ}VvlH
else 0Qz \"gr
insertSort(data, l, mid - l + 1); p*Cbe\
if ((r - mid) > THRESHOLD) U<x3=P
mergeSort(data, temp, mid + 1, r); RD^o&VXO
else "rtmDNpL
insertSort(data, mid + 1, r - mid); 5h&8!!$[
;A_QI>>
for (i = l; i <= mid; i++) { z; +x`i.
temp = data; smggr{-
} ;_!;D#:
for (j = 1; j <= r - mid; j++) { $si2H8
temp[r - j + 1] = data[j + mid]; {<lV=0]
} Qa=;Elp:[
int a = temp[l]; })Jp5vv
int b = temp[r]; _]g6 3q
for (i = l, j = r, k = l; k <= r; k++) { :n=+$Dq
if (a < b) { R0>L[1o
data[k] = temp[i++]; '@FKgy;B)-
a = temp; sx;1V{|g
} else { y< 84Gw_
data[k] = temp[j--]; 5o?bF3
b = temp[j]; #X+)
} 6m9Z5:xG
} B!Y;VdX
} g?ft;kR6S
uv$y"1'g
/** >}iYZ[ V
* @param data 51A>eU|
* @param l j<[<qU:
* @param i d 9|u~3
*/ PF~&!~S>W
private void insertSort(int[] data, int start, int len) { 4D8q Gti
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f`Nu]#i
} {,m!%FDL
} L_(|5#IDw
} .3[YOM7h
} |b@-1
KM6r}CDHs
堆排序： "(5M }5D
w*?JW
package org.rut.util.algorithm.support; F 1BPzRo`
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import org.rut.util.algorithm.SortUtil; ^U52 *6
|cH\w"DcXw
/** TSOt$7-
* @author treeroot p8Pvctc
* @since 2006-2-2 F~m tE8B:
* @version 1.0 z;-2xD0&U[
*/ P_9O8"W
public class HeapSort implements SortUtil.Sort{ )vw3Y88
~o+u:]
/* (non-Javadoc) j=7]"%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `'~|DG}a
*/ /)|*Vzu
public void sort(int[] data) { SpkD
MaxHeap h=new MaxHeap(); 9%x[z%06
h.init(data); \ZA%"F){
for(int i=0;i h.remove(); pJqayzV
System.arraycopy(h.queue,1,data,0,data.length); Y!KGJ^.mF
} b[$>HB_Na
E0YXgQa
private static class MaxHeap{ l)?c3
{w2<;YXj!
void init(int[] data){ F](kU#3"S
this.queue=new int[data.length+1]; %FwLFo^v
for(int i=0;i queue[++size]=data; PffRV7qU0
fixUp(size); #JVcl $0Y
} j0Q;OKu
} yd2ouCUV
8g<3J-7Mm
private int size=0; ^ H'|iju
$Uzc
private int[] queue; @r#>-p
Ih.o;8PpK
public int get() { Ji=E 1R
return queue[1]; VBOq~>V6(v
} Ls9G:>'rR
doG&qXw
public void remove() { uvT]MgT
SortUtil.swap(queue,1,size--); ztf(.~
fixDown(1); *p VKMmU
} I` /'\cU9
file://fixdown ~(}zp<e|
private void fixDown(int k) { +_+}^Nf]Y3
int j; R!:1{1
while ((j = k << 1) <= size) { k+&|*!j
if (j < size %26amp;%26amp; queue[j] j++; %hY+%^k.
if (queue[k]>queue[j]) file://不用交换 na<g /&
break; 8G9V8hS1#B
SortUtil.swap(queue,j,k); BH=vI<D
k = j; eI- ~ +.
} $L?stgU
} &DgIykqN
private void fixUp(int k) { U|,VH-#
while (k > 1) { m~#O ~)
int j = k >> 1; zp d4uto5
if (queue[j]>queue[k]) A\WgtM
break; %6 Bt%H
SortUtil.swap(queue,j,k); fuQ?@F
k = j; Ehg5u'cj
} Y]P]^3
} Dk:Zeo]+my
F`'e/
} B6,"S5@
1h|JKu0
} QGfU:
'H+pwp"M@
SortUtil： 8He^j5
"Y4tt0I
package org.rut.util.algorithm; UAa2oY&
2uz<n}IV
import org.rut.util.algorithm.support.BubbleSort; yt$V<8a
import org.rut.util.algorithm.support.HeapSort; UA}k"uM
import org.rut.util.algorithm.support.ImprovedMergeSort; <jfi"SJu
import org.rut.util.algorithm.support.ImprovedQuickSort; 2Ui)'0
import org.rut.util.algorithm.support.InsertSort; {4UlJ,Z.n
import org.rut.util.algorithm.support.MergeSort; x2;92I{5C,
import org.rut.util.algorithm.support.QuickSort; RoPz?,u
import org.rut.util.algorithm.support.SelectionSort; 6Vi #O^>
import org.rut.util.algorithm.support.ShellSort; aiea&aJ
<vOljo
/** wOINcEdx
* @author treeroot haS`V
* @since 2006-2-2 s(F^P
* @version 1.0 a(!:a+9WOP
*/ A:>G:X5t
public class SortUtil { W&)OiZN
public final static int INSERT = 1; t[%9z6t
public final static int BUBBLE = 2; DqbN=[!X~n
public final static int SELECTION = 3; [K,&s8N5
public final static int SHELL = 4; 6dV92:
public final static int QUICK = 5; ACc.&,!IZ
public final static int IMPROVED_QUICK = 6; >AV?g8B;
public final static int MERGE = 7; -49OE*uF
public final static int IMPROVED_MERGE = 8; _<&IpT{w+
public final static int HEAP = 9; (V}DPA
"@DCQ
public static void sort(int[] data) { W.{#Pg1Da
sort(data, IMPROVED_QUICK); HX?5O$<<N
} EPW Iu)A
private static String[] name={ b>?X8)f2e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jO3Z2/#
}; Q lql(*
$GPenQ~},
private static Sort[] impl=new Sort[]{ -fn["R]
new InsertSort(), sLPFeibof5
new BubbleSort(), {^5r5GB=*
new SelectionSort(), CZt)Q4
new ShellSort(), | \C{R
new QuickSort(), -7>vh|3
new ImprovedQuickSort(), jmz, 1[
new MergeSort(), ,@8>=rT
new ImprovedMergeSort(), 5,k&^CK}
new HeapSort() Ay/ "2pDZ
}; %#Fd0L
Y<I/y
public static String toString(int algorithm){ t :sKvJ
return name[algorithm-1]; "EDn;l-Q
} p~En~?<
3T%WfS+
public static void sort(int[] data, int algorithm) { aa8WRf
impl[algorithm-1].sort(data); ^3F[^#"
} 0l!@bj
esWgYAc3{
public static interface Sort { ySL 31%
public void sort(int[] data); G/bWn@
} 5,|^4 ZA
-aXV}ZY"
public static void swap(int[] data, int i, int j) { ;q59Cr75
int temp = data; eZk [6H
data = data[j]; V.>'\b/#
data[j] = temp; FD,M.kbg
} s'J8E+&5
} `b+f^6SJn