[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; |gW
} (|dPeix|
int i1=l; <~N%W#z/
int i2=mid+1; j AQU~Ol_
for(int cur=l;cur<=r;cur++){ C-Ig_Nc
if(i1==mid+1) 7u::5W-q
data[cur]=temp[i2++]; pr$~8e=c
else if(i2>r) #MglHQO+
data[cur]=temp[i1++]; @ ICbKg:
else if(temp[i1] data[cur]=temp[i1++]; 0Qp[\ia
else |0kXCq
data[cur]=temp[i2++]; Z["BgEJ
} +TF8WZZF.d
} PS$k >_=t
}a^|L"
} 9#Bx]wy
(')(d HHW
改进后的归并排序: 8aZ$5^z
Pxqiv9D<R
package org.rut.util.algorithm.support; =-Nsc1&
;\x~'@
import org.rut.util.algorithm.SortUtil; HxZ.OZbR
;SKcbws
/** LQqfi ~
* @author treeroot q? 9GrwL8F
* @since 2006-2-2 ]IS;\~
* @version 1.0 1[s0Lz
*/ &wjB{%
public class ImprovedMergeSort implements SortUtil.Sort { +xZQJeKb
p,;mYms
private static final int THRESHOLD = 10; \_9rr6^"
L,$3Yj
/* =m9i)Q
* (non-Javadoc) )|MJnx9
* oNIFx5*Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3$_*N(e
*/ 7}%H2$Do
public void sort(int[] data) { ybE[B}pOeZ
int[] temp=new int[data.length]; bAiJn<
mergeSort(data,temp,0,data.length-1); s"coQ!e1.
} \(fq8AL?
r|fO7PD
private void mergeSort(int[] data, int[] temp, int l, int r) { 5)`h0TK
int i, j, k; ('4wXD]C
int mid = (l + r) / 2; ,9\Snn
if (l == r) K6B4sE
return; 8teJ*sz
if ((mid - l) >= THRESHOLD) n=o_1M|
mergeSort(data, temp, l, mid); Za%LAyT_s
else qjAh6Q/E`
insertSort(data, l, mid - l + 1); *ik/p
if ((r - mid) > THRESHOLD) #tDW!Xv?
mergeSort(data, temp, mid + 1, r); Y)Tl<
else 5g>wV
insertSort(data, mid + 1, r - mid); CTp!di|
7$7n71o
for (i = l; i <= mid; i++) { H\#:,s{1
temp = data; ")%r}:0
} 3D_"yZ
for (j = 1; j <= r - mid; j++) { ){ gAj
temp[r - j + 1] = data[j + mid]; M{E{NK
} NXI[q'y
int a = temp[l]; XYAmJ
int b = temp[r]; .S7:;%qL6
for (i = l, j = r, k = l; k <= r; k++) { "SR5wr
if (a < b) { [PWL<t::c
data[k] = temp[i++]; kjE*9bUc
a = temp; Q["t eo]DQ
} else { >1ZJ{se
data[k] = temp[j--]; 6P*O&1hv
b = temp[j]; sS9%3i/>
} TzKK;(GX
} WYszk ,E
} Q7GY3X*kA
N4wA#\-
/** =~jAoOC@
* @param data wz=z?AZW
* @param l P1V1as
* @param i ;#/0b{XFj
*/ S GM!#K
private void insertSort(int[] data, int start, int len) { 78]gtJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JJnYOau
} P^i.La,
} E\$C/}T
} S_\ F
} &z@~B&O
nIBFk?)6
堆排序： >qh?L#Fk
F8=nhn
package org.rut.util.algorithm.support; Cv^`&\[SW+
6ep>hS4A&
import org.rut.util.algorithm.SortUtil; Fm3t'^SqF
!9 f4R/ ?
/** c-8!#~M(
* @author treeroot z<&m*0WYA
* @since 2006-2-2 8omC%a}9m
* @version 1.0 0m)&YFZ[(
*/ LchnBtjn
public class HeapSort implements SortUtil.Sort{ d8OL!Rk
f/y`
/* (non-Javadoc) 50n}my'2h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >]?H`>4(
*/ \ZH&LPAY
public void sort(int[] data) { b{5K2k&,
MaxHeap h=new MaxHeap(); E\th%q,mG
h.init(data); ]'h; {;ug
for(int i=0;i h.remove(); 8C7Z{@A&#
System.arraycopy(h.queue,1,data,0,data.length); _Qd,VE 8u
} P8I*dvu _
|d}MxS`^
private static class MaxHeap{ x0Z5zV9
.CbGDZ
void init(int[] data){ |vILp/"9=W
this.queue=new int[data.length+1]; kWW w<cA
for(int i=0;i queue[++size]=data; >M;u*Go`QO
fixUp(size); Cifd21v4
} &`!^Zq vG
} $nPAm6mH
(^n*Am;zlH
private int size=0; thW<
uk7'K 0j
private int[] queue; m*e YC
WsOi,oG@
public int get() { =? :@
return queue[1]; e/s(ojDW
} ]%dnKP~
:}q\tNY<
public void remove() { \a|L/9%
SortUtil.swap(queue,1,size--); pq!%?m]
fixDown(1); #"f'7'TE
} u8vuwbra!
file://fixdown ZafboqsDL
private void fixDown(int k) { %0-wpuHc(]
int j; {`"#yl6"
while ((j = k << 1) <= size) { Lm%GR[tyQ
if (j < size %26amp;%26amp; queue[j] j++; w4:\N U
if (queue[k]>queue[j]) file://不用交换 m~`>`4
break; - u3e5gW
SortUtil.swap(queue,j,k); }!d;(/)rb
k = j; *}!MOqP
} >-)h|w i
} %[QV,fD'E
private void fixUp(int k) { }e]f
while (k > 1) { 39TT{>?`w
int j = k >> 1; O'DW5hBL0
if (queue[j]>queue[k]) lU2c_4
break; rrBAQY|.
SortUtil.swap(queue,j,k); KMK`F{
k = j; 7^:4A'
} ;LwqTlJ*[L
} TprtE.mP
d"Q |I
} $2#7D* Rx
NPjv)TN}3
} SUtf[6
/Cr/RG:OX
SortUtil： E~hzh /,34
slW3qRT\k
package org.rut.util.algorithm; T-" I9kM
"ZMkL)'7-
import org.rut.util.algorithm.support.BubbleSort; ]MTbW=*}ED
import org.rut.util.algorithm.support.HeapSort; Qx`~g,wk8
import org.rut.util.algorithm.support.ImprovedMergeSort; !|G(Yg7C
import org.rut.util.algorithm.support.ImprovedQuickSort; (lH,JX`$a
import org.rut.util.algorithm.support.InsertSort; USPTpjt8R
import org.rut.util.algorithm.support.MergeSort; ANMg
import org.rut.util.algorithm.support.QuickSort; ~H6;I$e[
import org.rut.util.algorithm.support.SelectionSort; \h{r;#g
import org.rut.util.algorithm.support.ShellSort; |M~ON=
%y`7);.q
/** >_ \<E!j
* @author treeroot LMl~yqM
* @since 2006-2-2 =y]$0nh
* @version 1.0 &%C4Ugo
*/ ?Dsm~bkX[
public class SortUtil { 3I=kr
public final static int INSERT = 1; {Gi h&N
public final static int BUBBLE = 2; W{"XJt_
public final static int SELECTION = 3; )g1a'G
public final static int SHELL = 4; _}Ps(_5D
public final static int QUICK = 5; oQ2KW..q
public final static int IMPROVED_QUICK = 6; <:;^'x>!
public final static int MERGE = 7; hfM;/
public final static int IMPROVED_MERGE = 8; nBLj [
public final static int HEAP = 9; ]s1 YaNq
aP()|js
public static void sort(int[] data) { A.%CAGU5w
sort(data, IMPROVED_QUICK); B|{I:[
} 3:CO{=`\7B
private static String[] name={ "HIXm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" % 4 ~l
}; :`,3h%
${&5]!E[>D
private static Sort[] impl=new Sort[]{ m:CTPzAt
new InsertSort(), \E4B&!m
new BubbleSort(), \FzM4-
new SelectionSort(), 15H6:_+=0
new ShellSort(), :14i?4Fd
new QuickSort(), L2z2}U=<
new ImprovedQuickSort(), -V<t-}h.
new MergeSort(), "4xfrlOc
new ImprovedMergeSort(), P9Q2gVGAO{
new HeapSort() w7kJg'X/6
}; hkL5HzWn
V6a``i]
public static String toString(int algorithm){ Q5+_u/
return name[algorithm-1]; <,%:
} ~=n#}{/
pK&I^r
public static void sort(int[] data, int algorithm) { D&:yMp(
impl[algorithm-1].sort(data); o4^Fo p
} @e2}BhB2
NYB[Zyp
public static interface Sort { 12`_;[37
public void sort(int[] data); '3(l-nPiG^
} \ZXLX'-
7*H:Ob)9k
public static void swap(int[] data, int i, int j) { e;95a
int temp = data; xK%=
data = data[j]; `k{& /]
data[j] = temp; \c`oy=qY0
} Es5p}uh.[Y
} ra7uU*