[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; La\|Bwx
} p0C|ECH
int i1=l; A<{&?_U
int i2=mid+1; p~dj-w
for(int cur=l;cur<=r;cur++){ X,`e1nsR
if(i1==mid+1) O:+?:aI@
data[cur]=temp[i2++]; wg|/-q-
else if(i2>r) WR}<^ax
data[cur]=temp[i1++]; sF1j4 NC
else if(temp[i1] data[cur]=temp[i1++]; Q&e*[l2M6
else >0I\w$L
data[cur]=temp[i2++]; :6W* ;<o
} >{#QS"J#
} y-o54e$4Cq
nw
} 9~}.f1z
]gmkajCzD
改进后的归并排序: G/&Wc2k
6Wc.iomx8
package org.rut.util.algorithm.support; 90!67Ap`x
-{eI6#z|\A
import org.rut.util.algorithm.SortUtil; z=Khbh
I->4Q&3
/** N683!wNX
* @author treeroot `yrJ}f
* @since 2006-2-2 <[tU.nh
* @version 1.0 S3?U-R^`
*/ 9/6=[)
public class ImprovedMergeSort implements SortUtil.Sort { nfS.0\z
YbuS[l8
private static final int THRESHOLD = 10; F^X:5g~K
&U yQ<O>
/* myDcr|j-a
* (non-Javadoc) 8J8@0
* N@\`DO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) io*iA<@Gx
*/ Dh .<&ri
public void sort(int[] data) { m]'P3^<{P
int[] temp=new int[data.length]; n!%'%%o2v
mergeSort(data,temp,0,data.length-1); '<&rMn
} p-B |Gr|
P30|TU+B
private void mergeSort(int[] data, int[] temp, int l, int r) { xRm~a-rp
int i, j, k; CF/8d6}Vf
int mid = (l + r) / 2; z460a[Wl
if (l == r) Mtq^6`JJ'
return; 2Z*^)ZQB
if ((mid - l) >= THRESHOLD) a VIh|v
mergeSort(data, temp, l, mid); X>ck.}F
else '%[r9w
insertSort(data, l, mid - l + 1); EGK7)O'W
if ((r - mid) > THRESHOLD) Yk yB
mergeSort(data, temp, mid + 1, r); fi';Mb3B3
else 48n7<M;I
insertSort(data, mid + 1, r - mid); Ll0"<G2t
l&uBEYx
for (i = l; i <= mid; i++) { N_f>5uv
temp = data; 9NausE40
} =J^FV_1rJ
for (j = 1; j <= r - mid; j++) { v42Z&PO
temp[r - j + 1] = data[j + mid]; L'<.#(|
} &9\8IR>
int a = temp[l]; e2L4E8ST<
int b = temp[r]; qruv^#_l
for (i = l, j = r, k = l; k <= r; k++) { JG=z~STz
if (a < b) { {[[/*1r|
data[k] = temp[i++]; 9u] "($
a = temp; Oq*=oz^~1
} else { )cYbE1=u8>
data[k] = temp[j--]; 2G)q?_Q4S
b = temp[j]; &HJ'//bv
} )jed@?
} 3Jw}MFFV
} mI-9=6T_
(GbZt{.
/** x4;ndck%U
* @param data YQ7tZl;:t
* @param l >m8~Fs0
* @param i -*~~00w
*/ GbJVw\5Z*
private void insertSort(int[] data, int start, int len) { "UTAh6[3oD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); */A ~lR|
} ZoroK.N4A%
} ,nz3S5~
} L<_zQ
} c^`(5}39v
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堆排序： NLF6O9
R6-Z]Hu
package org.rut.util.algorithm.support; PR~9*#"v..
{}N=pL8MS
import org.rut.util.algorithm.SortUtil; n_@cjO
pEX|zee
/** >IE`, fe
* @author treeroot do=s=&T
* @since 2006-2-2 HiTj-O
* @version 1.0 >PONu]^
*/ esK0H<]
public class HeapSort implements SortUtil.Sort{ Ygfv?
+~eybm;
/* (non-Javadoc) n ?+dX^j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f%Vdao[
*/ ;B6m;[M+
public void sort(int[] data) { Pm!/#PtX
MaxHeap h=new MaxHeap(); %)!b254
h.init(data); 1eMz"@Q9
for(int i=0;i h.remove(); >PoVK{&y
System.arraycopy(h.queue,1,data,0,data.length); qfsu# R
} RzN9pAe
?$Ii_.
private static class MaxHeap{ zM!2JC
-VkPy<)
void init(int[] data){ v `7`'
this.queue=new int[data.length+1]; N_| '`]D
for(int i=0;i queue[++size]=data; *1CZRfWI
fixUp(size); <K GYwLk
} aF%V
} o6A1;e
-9~WtTaV.H
private int size=0; a474[?
,'>O#kD
private int[] queue; eGQ-Ht,N
B:=VMX~GE
public int get() { Ff{dOV.i
return queue[1]; _"G./X
} U['|t<^uf
hLF;MH@
public void remove() { B):hm
SortUtil.swap(queue,1,size--); {`=k$1
fixDown(1); D);w)`
} J3,m{%EtNM
file://fixdown &~sirxR p
private void fixDown(int k) { 5;q{9wvqO
int j; 0. mS^g,M-
while ((j = k << 1) <= size) { v5dLjy5
if (j < size %26amp;%26amp; queue[j] j++; V3q[#.o
if (queue[k]>queue[j]) file://不用交换 feG#*m2g
break; C] >?YR4
SortUtil.swap(queue,j,k); %#iu
k = j; ~9DD=5\
} JpC_au7CX
} -mY,nMDb
private void fixUp(int k) { 8KHT"uc'*J
while (k > 1) { aYws{Vii
int j = k >> 1; @t4OpU<'*b
if (queue[j]>queue[k]) C9L_`[9DO
break; !i5~>p|4@
SortUtil.swap(queue,j,k); MyaJhA6c
k = j; V3c7F4\
} OS sYmF
} DZqY=Sze
vfloha p
} pgEDh^[MW
NGVl/Qd
} VQl(5\6O
,'&H`h54
SortUtil： JUdQ Q
y87oW_"h
package org.rut.util.algorithm; xj;V
OmLe+,7'
import org.rut.util.algorithm.support.BubbleSort; *:V+whBY
import org.rut.util.algorithm.support.HeapSort; Z,7VOf6g
import org.rut.util.algorithm.support.ImprovedMergeSort; 12HE=
import org.rut.util.algorithm.support.ImprovedQuickSort; <P.'r,"[
import org.rut.util.algorithm.support.InsertSort; U*:E|'>
import org.rut.util.algorithm.support.MergeSort; ]'5 G/H5?;
import org.rut.util.algorithm.support.QuickSort; 'ZAl7k .
import org.rut.util.algorithm.support.SelectionSort; 6 U_P
import org.rut.util.algorithm.support.ShellSort; M3Oqto<8"
*=(vIm[KL
/** ,yH\nqEz
* @author treeroot M$UZn
* @since 2006-2-2 OU'm0Jlk
* @version 1.0 5[Uv%A?H#_
*/ \h5!u1{L
public class SortUtil { Sjo7NR^#e
public final static int INSERT = 1; 5&TH\2u
public final static int BUBBLE = 2; {fa3"k_ke
public final static int SELECTION = 3; P$5K[Y4f
public final static int SHELL = 4; VMH^jCFp
public final static int QUICK = 5; 20cEE>
public final static int IMPROVED_QUICK = 6; .JX9(#Uk
public final static int MERGE = 7; DhD^w;f]
public final static int IMPROVED_MERGE = 8; D";@)\jN
public final static int HEAP = 9; ^]MLEr!S
Fx )BMP
public static void sort(int[] data) { -Pc6W9$
sort(data, IMPROVED_QUICK); aKz:hG
} y3OF+;E
private static String[] name={ vp(ow]Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ticx]_+~T
}; bW^C30m
{BzE
private static Sort[] impl=new Sort[]{ 0sI7UK`m
new InsertSort(), FaQc@4%o
new BubbleSort(), uYC1}Y5N
new SelectionSort(), nYE%@Up
new ShellSort(), OXI>`$we
new QuickSort(), ;b!qt-;.<
new ImprovedQuickSort(), pv]" 2'aQ
new MergeSort(), #p2`9o
new ImprovedMergeSort(), *" +u^
new HeapSort() ZQ{-6VCjl
}; {A'_5 X9
iTVZo?lVo
public static String toString(int algorithm){ 9qUkw&}H
return name[algorithm-1]; Oi<yT"7
} 5i+cjT2
-tfUkGdx;l
public static void sort(int[] data, int algorithm) { b_^y Ke^W
impl[algorithm-1].sort(data); ?NR&3q
} $4q$!jB5
G`RQl@W>)(
public static interface Sort { V.Tn1i-v
public void sort(int[] data); PU8dr|!
} fj'7\[nZ
)3k?{1:
public static void swap(int[] data, int i, int j) { <QD[hO^/
int temp = data; JJK-+a6cX
data = data[j]; nF$HWp&gt
data[j] = temp; :0Z\-7iK
} ih-J{1
} jl5&T{z