[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; 7)U ik}0
} 3FvVM0l"
int i1=l; GbLHzw
int i2=mid+1; ^x0N]/
for(int cur=l;cur<=r;cur++){ E]Mx<7;\.
if(i1==mid+1) ICz:>4M-dn
data[cur]=temp[i2++]; `%\CO`
else if(i2>r) LGc8w>qE
data[cur]=temp[i1++]; ]\rQ{No
else if(temp[i1] data[cur]=temp[i1++]; ]EK(k7nH
else .c>6}:ye
data[cur]=temp[i2++]; mx)!]B"
} %oqKpD+
} Ko&4{}/
2|"D\N
} /[?}LrDO
P<>NV4
改进后的归并排序: +o@:8!IM1
r0nnmy]{d
package org.rut.util.algorithm.support; @q!T,({kx
zsuqRM "
import org.rut.util.algorithm.SortUtil; .$s']' =
A,&711Y
/** C[fefV9g2
* @author treeroot 5BA:^4zr?
* @since 2006-2-2 F;_c x
* @version 1.0 9qDM0'WuU
*/ RR=WD-l
public class ImprovedMergeSort implements SortUtil.Sort { bj`GGxzOb
iuj%.}
private static final int THRESHOLD = 10; ]Sj;\Iz
NU_^*@k
/* Zb_A(mnzh
* (non-Javadoc) 2c]751
* Ep(xlHTv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mxEe -q
*/ .<vXj QE
public void sort(int[] data) { >-V632(/{o
int[] temp=new int[data.length]; ts<\n-f
mergeSort(data,temp,0,data.length-1); 9Tr ceL;
} Ytc[ kp
'__>M>[
private void mergeSort(int[] data, int[] temp, int l, int r) { \5tG>>c i
int i, j, k; 3XB`|\:
int mid = (l + r) / 2; t;Z9p7rk
if (l == r) k>i`G5Dh
return; HPu+ 4xQV
if ((mid - l) >= THRESHOLD) &~;M16XM,e
mergeSort(data, temp, l, mid); +-b'+mF
else Wtaz@+
insertSort(data, l, mid - l + 1); |11vm#
if ((r - mid) > THRESHOLD) ^>%.l'1/(
mergeSort(data, temp, mid + 1, r); I~6(>Z{
else rMVcoO@3
insertSort(data, mid + 1, r - mid); T-yEn&r4)
#yIHr&'oX
for (i = l; i <= mid; i++) { u ]y[g
temp = data; ^O<'Qp,[:
} ogSDV
for (j = 1; j <= r - mid; j++) { =p5]r:9W
temp[r - j + 1] = data[j + mid]; _"x%s
} 1.u^shc&|
int a = temp[l]; UUDbOxD^w
int b = temp[r]; f6J]=9jU
for (i = l, j = r, k = l; k <= r; k++) { /pkN=OBR
if (a < b) { _'mC*7+
data[k] = temp[i++]; tBkgn3w
a = temp; EZ>(}
} else { 0t7)x8c
data[k] = temp[j--]; N"<.v6Z
b = temp[j]; E,\)tZ;,
} Id^q!4Th9
} S]=.p-Am
} S0OL;[*.
ZD]{HxGL!
/** fJ\?+,
* @param data ] 7[#K^
* @param l *.eeiSi{
* @param i E$z-|-{>
*/ cQxUEY('+
private void insertSort(int[] data, int start, int len) { ez9F!1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Py#EjF12
} #-Mr3
} Wm"q8-<<
} 8.jf6
} "6IZf>N@#
1`|Z8Jpocj
堆排序： 0827z
CB-;Jqb
package org.rut.util.algorithm.support; m+8:_0x "
:FU?vh$)
import org.rut.util.algorithm.SortUtil; @i> r(X
(X^,.qy
/** LN(\B:wAY
* @author treeroot W4av?H
* @since 2006-2-2 FZ%h7Oe
* @version 1.0 gnzg(Y]5w
*/ WJ-.?
public class HeapSort implements SortUtil.Sort{ AvZ5?rN$
Zgp9Uu}"
/* (non-Javadoc) a_/4^+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) doTbol?+
*/ &c"!Y)%G
public void sort(int[] data) { !4#qaH-Q
MaxHeap h=new MaxHeap(); &/Gn!J;1
h.init(data); )uAY_()/
for(int i=0;i h.remove(); DazoY&AWE
System.arraycopy(h.queue,1,data,0,data.length); X0+E!~X$zM
} XPf{R619
[?:MIl#!
private static class MaxHeap{ !_3b#Caf
x0%m}P/
void init(int[] data){ @1xVWSF
this.queue=new int[data.length+1]; #%ld~dgz-
for(int i=0;i queue[++size]=data; C7R3W,
fixUp(size); I6;6x
} yKrbGK*=_
} ID`C
fBZLWfp9
private int size=0; #?r|6<4X
ChUE,)
private int[] queue; \z2y?"\?
I+twI&GS
public int get() { LHx ")H?,
return queue[1]; 2!}F+^8'P
} ,6MJW#~]
Hmm0H6&u
public void remove() { 'MX|=K!C
SortUtil.swap(queue,1,size--); !%}n9vr!}\
fixDown(1); )M"NMUuU"
} @,=pG
file://fixdown ,J+L_S+B~
private void fixDown(int k) { 9XQE5^
int j; W+u,[_
while ((j = k << 1) <= size) { -0q|AB<
if (j < size %26amp;%26amp; queue[j] j++; N2 3:+u<)E
if (queue[k]>queue[j]) file://不用交换 V;RgO}
break; gi/k#3_m
SortUtil.swap(queue,j,k); Iv3yDL;
k = j; /kyO,g$9
} r)-{~JA!
} Jb$G
private void fixUp(int k) { 12L`Gi
while (k > 1) { qHgtd+ I
int j = k >> 1; ?mC'ZYQI
if (queue[j]>queue[k]) kmTYRl )j
break; i)(G0/:
SortUtil.swap(queue,j,k); V.$tq
k = j; urkuG4cY
} &0[L2x}7
} Opf)TAl{
~a3u['B
} w(`g)`
/d6Rdl`w
} *XWu)>*o
<X{w^ cT_Q
SortUtil： #mUQ@X@K
>Q(\vl@N=
package org.rut.util.algorithm; 5Hj/7~ =
@+zWLq!1pB
import org.rut.util.algorithm.support.BubbleSort; W//+[
import org.rut.util.algorithm.support.HeapSort; hTO2+F*
import org.rut.util.algorithm.support.ImprovedMergeSort; Va.TUz4
import org.rut.util.algorithm.support.ImprovedQuickSort; NL `
import org.rut.util.algorithm.support.InsertSort; MUZ]*n&0
import org.rut.util.algorithm.support.MergeSort; >Ho=L)u
import org.rut.util.algorithm.support.QuickSort; RuVk>(?WK%
import org.rut.util.algorithm.support.SelectionSort; "8ZV%%elp
import org.rut.util.algorithm.support.ShellSort; [~|k;\2 +
`_GCS,/t
/** ZRc^}5}WA
* @author treeroot rxol7"2l
* @since 2006-2-2 s}Go")p<:
* @version 1.0 UMNNAX
*/ |Fze9kZO
public class SortUtil { 3}phg
public final static int INSERT = 1; ns5Dydo{T
public final static int BUBBLE = 2; D}}?{pe
public final static int SELECTION = 3; >*O5Ry:4
public final static int SHELL = 4; d)biMI}<5
public final static int QUICK = 5; rq7yNt
public final static int IMPROVED_QUICK = 6; kk<%VKC
public final static int MERGE = 7; qHe H/e%`V
public final static int IMPROVED_MERGE = 8; '^WR5P<8c
public final static int HEAP = 9; (t5y$bc
}yrs6pQ
public static void sort(int[] data) { &I)tI^P}
sort(data, IMPROVED_QUICK); g%]<sRl:-
} PCgr`($U
private static String[] name={ h"8[1 ;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {W{;VJKQ2
}; ,%x2SyA
G6>sAOf
private static Sort[] impl=new Sort[]{ WW3Jxd
new InsertSort(), !F~1+V>zP
new BubbleSort(), bxxLAWQ(
new SelectionSort(), \6APU7S
new ShellSort(), 5"3`ss<m
new QuickSort(), I+kL;YdS
new ImprovedQuickSort(), MW+DqT.h
new MergeSort(), YZOwr72VL
new ImprovedMergeSort(), hTZ6@i/pS
new HeapSort() )$f?v22
}; *UW 8|\;
3I}AA.h'00
public static String toString(int algorithm){ $,r%@'=&
return name[algorithm-1]; 0)h.[O8@>
} ZW"f*vwQo
: Gi8Jo
public static void sort(int[] data, int algorithm) { ":/Vp,g
impl[algorithm-1].sort(data); am.d^'
} ;}S_PnwC@
k 75 p
public static interface Sort { 6 mLC{X[
public void sort(int[] data); =&"pG`x
} @%u}|iF|
?uTuO
public static void swap(int[] data, int i, int j) { &u[F)|
int temp = data; !E00I0W-h
data = data[j]; />9`Mbg[G
data[j] = temp; |8k^jq
} F:<+}{Av
} >#mKM%T2MJ