[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; nM8[
} *GJ:+U&m[
int i1=l; e\D| o?v
int i2=mid+1; U7h(-dV
for(int cur=l;cur<=r;cur++){ a~opE!|m
if(i1==mid+1) w^Ag]HZN
data[cur]=temp[i2++]; &<Zdyf?[Ou
else if(i2>r) 8eN7VT eb
data[cur]=temp[i1++]; \x(^]/@
else if(temp[i1] data[cur]=temp[i1++]; f}iU& 3S
else s1bU
data[cur]=temp[i2++]; hO3{
} Wo!;K|~P
} R&*@@F-dx
{n&Uf{
} k3>YBf`fC
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改进后的归并排序: [9AM\n>g
F?BS717qS%
package org.rut.util.algorithm.support; <( EyXV
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import org.rut.util.algorithm.SortUtil; D:9 2\l
Q+'nw9:;T
/** UV@0gdy[
* @author treeroot G?xJv`"9iC
* @since 2006-2-2 [Gtb+'8
* @version 1.0 O,'#C\
*/ ($8t%jVWJJ
public class ImprovedMergeSort implements SortUtil.Sort { {[W(a<%bXm
]Lm'RlV
private static final int THRESHOLD = 10; 8EI:(NE*J
"%@v++4y
/* 6pp$-uS
* (non-Javadoc) S)7/0N79A
* ix&'0IrX*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qnt5HSSt
*/ `*_CElpP"
public void sort(int[] data) { pRrHuLj^
int[] temp=new int[data.length]; Z9[+'ZWt
mergeSort(data,temp,0,data.length-1); ]C!?HQ{bsf
} z:}nBCmLV
S&wzB)#'
private void mergeSort(int[] data, int[] temp, int l, int r) { u-:Ic.ZV
int i, j, k; 'SV7$,mK@
int mid = (l + r) / 2; "r$/
if (l == r) cP rwW6
return; vFhz!P~
if ((mid - l) >= THRESHOLD) e.8$ga{
mergeSort(data, temp, l, mid); (>7>3
else >bIF>9T
insertSort(data, l, mid - l + 1); Y3rt5\!
if ((r - mid) > THRESHOLD) 9 <\`nm
mergeSort(data, temp, mid + 1, r); PVYyE3`UB
else WD.U"YI8y
insertSort(data, mid + 1, r - mid); `q_<Im%I
!Z|($21W
for (i = l; i <= mid; i++) { qINTCm j
temp = data; izuF !9
} /{*$JF
for (j = 1; j <= r - mid; j++) { Qihdn66
temp[r - j + 1] = data[j + mid]; VteEDL/w
} #{PmNx%M
int a = temp[l]; ppN} k)m
int b = temp[r]; 6R4<J%$P
for (i = l, j = r, k = l; k <= r; k++) { ^R~~L
if (a < b) { Q2QY* A
data[k] = temp[i++]; f~ U.a.Fb
a = temp; >5ChcefH
} else { ,;jGJr
data[k] = temp[j--]; m3 -9b"
b = temp[j]; r*XLV{+4
} 5/@UVY9_
} orfp>B) 0
} H"Dn]$Q\Z
2?DRLF]
/** {vVTv SC
* @param data :]II-$/8
* @param l Ed-M7#wY
* @param i tSHFm-q`
*/ 0xMj=3']
private void insertSort(int[] data, int start, int len) { 3)N\'xFh@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i$uN4tVKT
} .%}+R|g
} ]Kh2;>= Xj
} 8Vn4.R[vE
} 7o]HQ[xO
)jDJMi_[
堆排序： 'jfRt-_-
^}$O|t
package org.rut.util.algorithm.support; 5?u}#zO
0XU}B\'<
import org.rut.util.algorithm.SortUtil; n}nEcXb
8@\7&C(g17
/** "![L#)"s
* @author treeroot qoX@@xr1
* @since 2006-2-2 vHKlLl>*2
* @version 1.0 <02m%rhuW
*/ qJv[MBjk3B
public class HeapSort implements SortUtil.Sort{ r'4:)~]s
eJ@~o{,?>
/* (non-Javadoc) GbZ;#^S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K=\O5#F?3
*/ jNyoN1M
public void sort(int[] data) { #&8rcu;/
MaxHeap h=new MaxHeap(); 7Y( 5]A9=
h.init(data); iK;opA"
for(int i=0;i h.remove(); @g-Tk
System.arraycopy(h.queue,1,data,0,data.length); MMQ;mw=^]
} v~)LO2y
n/Dp"4H%q
private static class MaxHeap{ /-M@[p&
,kM)7!]N
void init(int[] data){ /X*oS&-M
this.queue=new int[data.length+1]; zfI}Q}p
for(int i=0;i queue[++size]=data; Acm<-de
fixUp(size); } cNW^4F
} ~Y!kB:D5;~
} MuI2?:~:*4
.*/Fucr
private int size=0; {2KFD\i\
zGlZ!t:
private int[] queue; ip:LcGt
;;U:Jtn2
public int get() { 9Kv|>#zff
return queue[1]; b[ w;i]2
} !CY&{LEYn0
[iS$JG-
public void remove() { iCQ>@P]nE
SortUtil.swap(queue,1,size--); 7jG(<!,
fixDown(1); ROb\Rxm
} 19U]2D/z
file://fixdown !{%:qQiA
private void fixDown(int k) { $jzFc!rs
int j; hZ$t$3
while ((j = k << 1) <= size) { dp5cDF}l
if (j < size %26amp;%26amp; queue[j] j++; 0 p uY"[c
if (queue[k]>queue[j]) file://不用交换 HIvZQQW|
break; j}JZ
SortUtil.swap(queue,j,k); q6d~V]4:
k = j; ,FSrn~-j9
} ^+|De}`u
} | A)\ :
private void fixUp(int k) { b^CNVdo'
while (k > 1) { L"(4R^]
int j = k >> 1; {]N3f[w
if (queue[j]>queue[k]) L,_.$1d
break; a[!%Ld
SortUtil.swap(queue,j,k); 7(a2L&k^
k = j; j;~%lg=)
} 0y#Ih {L
} nHXX\i
\IM4Z|NN"
} mI1H!
p*3; hGp6
} Sv[5NZn0&
&(pjqV
SortUtil： *ZCn8m:-+
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package org.rut.util.algorithm; pox,Im
R{hf9R,
import org.rut.util.algorithm.support.BubbleSort; I/J7rkf
import org.rut.util.algorithm.support.HeapSort; sy5 Fn~\R
import org.rut.util.algorithm.support.ImprovedMergeSort; ?}P5p^6
import org.rut.util.algorithm.support.ImprovedQuickSort; ^"8wUsP
import org.rut.util.algorithm.support.InsertSort; Hf gz02Z$
import org.rut.util.algorithm.support.MergeSort; b7:0#l$
import org.rut.util.algorithm.support.QuickSort; s][24)99
import org.rut.util.algorithm.support.SelectionSort; [U{UW4
import org.rut.util.algorithm.support.ShellSort; &:#h$`4
R W/z1
/** xyh.N)
* @author treeroot $7Jo8^RE
* @since 2006-2-2 }:Z9Vc ZP`
* @version 1.0 N_C;&hJN$w
*/ 9)dfL?x8V{
public class SortUtil { $%k1fa C
public final static int INSERT = 1; $4=f+ "z
public final static int BUBBLE = 2; RVw9Y*]b
public final static int SELECTION = 3; clO,}Ph>
public final static int SHELL = 4; uKr1Z2
public final static int QUICK = 5; SI:ifR&T
public final static int IMPROVED_QUICK = 6; 2][DZl
public final static int MERGE = 7; &"Ux6mF-"
public final static int IMPROVED_MERGE = 8; :;]Oc
public final static int HEAP = 9; P\2M[Gu(Q
#;KsJb)N.
public static void sort(int[] data) { $14:(<
sort(data, IMPROVED_QUICK); vG41Ck1
} ~+F;q vq
private static String[] name={ ?9+@+q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S_(d9GK<
}; KFRw67^
(]2H7X:b
private static Sort[] impl=new Sort[]{ PXKJ^fa
new InsertSort(), <cN~jv-w$
new BubbleSort(), m:QG}{<.h
new SelectionSort(), B^ 7eoW
new ShellSort(), r),PtI0X
new QuickSort(), sN=6gCau
new ImprovedQuickSort(), jH;Du2w
new MergeSort(), `6=-WEo
new ImprovedMergeSort(), pL1i|O
new HeapSort() hf6f.Z
}; )$%Z:
$D1w5o-
public static String toString(int algorithm){ RBKOM$7
return name[algorithm-1]; :*514N
} ]jMKC8uz
dtStTT
public static void sort(int[] data, int algorithm) { S^I,Iz+`S'
impl[algorithm-1].sort(data); Dr<='Ux[5
} k`KGB
<!d"E@%v@
public static interface Sort { "8f?h%t
public void sort(int[] data); j V3)2C}
} h!@,8y[B
JtKp(k&
public static void swap(int[] data, int i, int j) { <i?a0
int temp = data; ^Mkk@F&1
data = data[j]; vT^Sk;E
data[j] = temp; Sb2v_o
} +xv!$gJEj
} z`Wt%tL(