[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; +9[s(E?SY
} k/mO(i%qi
int i1=l; \K%A}gnHe
int i2=mid+1; >q^l
for(int cur=l;cur<=r;cur++){ vY'E+M"+@
if(i1==mid+1) D/Hob
data[cur]=temp[i2++]; |nq}#
else if(i2>r) q}MPl2
data[cur]=temp[i1++]; ]}HuK#
else if(temp[i1] data[cur]=temp[i1++]; HZEDr}RN
else 1@ .Eh8y
data[cur]=temp[i2++]; 5,u'p8}.
} ~|.vz!A
} $Oi@B)=4d+
0MX``/Z72
} XfYhLE
?JI:>3e
改进后的归并排序: a534@U4,
f]37Xl%I
package org.rut.util.algorithm.support; C">w3#M%
18];fC
import org.rut.util.algorithm.SortUtil; EH~XN9b
-9> oB
/** 8}<4f|?
* @author treeroot {v~.zRW%]r
* @since 2006-2-2 5&N55?G6
* @version 1.0 a^QyYX}\qR
*/ c0Oc-,6J
public class ImprovedMergeSort implements SortUtil.Sort { j_Qkw ?
Jrm 9,7/
private static final int THRESHOLD = 10; kZJ.G
4Y:[YlfD.
/* D0HLU ~o
* (non-Javadoc) uSU[Y,'x
* RT$.r5l_@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yk!TQY4
*/ / +9o?Kxya
public void sort(int[] data) { OD`?BM
int[] temp=new int[data.length]; v\3}5v%YI
mergeSort(data,temp,0,data.length-1); 3r]N\c
} - }2AXP2q
b$k|D)_|
private void mergeSort(int[] data, int[] temp, int l, int r) { Cp[ NVmN
int i, j, k; j& ~`wGM
int mid = (l + r) / 2; 6|AD]/t^K
if (l == r) YH^h?s
return; RJO40&Z<Z
if ((mid - l) >= THRESHOLD) v cZg3:j
mergeSort(data, temp, l, mid); dyNKok#
else q#!]5
insertSort(data, l, mid - l + 1); JOvRUDZ
if ((r - mid) > THRESHOLD) <C6*-j1oz
mergeSort(data, temp, mid + 1, r); w] =q>p
else s+l3]Hd
insertSort(data, mid + 1, r - mid); %9lx)w
Vp~c$y+
for (i = l; i <= mid; i++) { OPP^n-iPr
temp = data; ">D7wX,.>
} WjVj@oC
for (j = 1; j <= r - mid; j++) { mf\eg`'4?
temp[r - j + 1] = data[j + mid]; GfMCHs
} Kfl#78$d
int a = temp[l]; Z<^TO1xs9B
int b = temp[r]; 67{>x[
for (i = l, j = r, k = l; k <= r; k++) { eg$y,Tx
if (a < b) { `7mRUDz
data[k] = temp[i++]; k}h\RCy%f
a = temp; k;W`6:Kjp
} else { a }m>
data[k] = temp[j--]; QFYO_$1Y)
b = temp[j]; Y&JK*d
} n13#}i{tm
} "x P2GZ
} 1*o=I-nOa
YN>k5\M_v
/** MrGq{,6C
* @param data >*FHJCe
* @param l XwNJHOaF
* @param i s%c>Ge
*/ 4T<4Rb[
private void insertSort(int[] data, int start, int len) { JX!@j3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &3t[p=
} O<EFm}Ae
} $VRVMY [q
} WXzSf.8p|
} dW`!/OaQD
|>U:Pb(
堆排序： 0`D` Je<t
01^+HEbm
package org.rut.util.algorithm.support; ]/klKqz
~?#B(t
import org.rut.util.algorithm.SortUtil; +91j 1?
VvSe`E*
/** *eLKD_D`!C
* @author treeroot X@j.$0eK
* @since 2006-2-2 k6b0&il
* @version 1.0 _>k&M7OU4
*/ ?0%3~E`l:
public class HeapSort implements SortUtil.Sort{ 1O{(9nNj
8uZM%7kI6+
/* (non-Javadoc) fKYRDGn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4,)EG1
*/ O7of9F~"
public void sort(int[] data) { {#o0vWS>
MaxHeap h=new MaxHeap(); RL|d-A+;
h.init(data); do$+ Eh
for(int i=0;i h.remove(); v+b#8
System.arraycopy(h.queue,1,data,0,data.length); XHER[8l
} c1x{$
"xK#%eJjWd
private static class MaxHeap{ N9}27T+4
rUL_=>3
void init(int[] data){ *\!>22*
this.queue=new int[data.length+1]; =}1)/gcM
for(int i=0;i queue[++size]=data; }#Gq*^w
fixUp(size); EpsjaOmAF
} h%*@82DKK
} Wp2$L-T&$
#PJHwvr
private int size=0; "z6xS;
E'ay @YAp
private int[] queue; ;ifPqLkO
N R0"yJV>
public int get() { nd4Z5=X
return queue[1]; fb*h.6^y9
} ZCC T
t|jp]Vp
public void remove() { :Q-QY)hH
SortUtil.swap(queue,1,size--); |mp~d<&
fixDown(1); Ww&r
} !+(c/ gwBh
file://fixdown gx ]5)O
private void fixDown(int k) { y`Nprwb
int j; 2P(6R.8;6
while ((j = k << 1) <= size) { LyuA("xB#
if (j < size %26amp;%26amp; queue[j] j++; &`^PO$
if (queue[k]>queue[j]) file://不用交换 FD[o94`%
break; V7}]39m(s
SortUtil.swap(queue,j,k); =73aME}
k = j; h; "pAE
} F+Dke>j
} "PePiW(i+
private void fixUp(int k) { &rbkw<=j
while (k > 1) { %5yP^BL0
int j = k >> 1; ;ZtN9l
if (queue[j]>queue[k]) fG_<HJS(~
break; !+V."*]l
SortUtil.swap(queue,j,k); a9N$I@bi]
k = j; zc.r&(d
} 8quH#IhB
} ZTg[}+0e
bHK[Z5
} 9~5LKg7Ac
Tf{lH9ca$
} F"| ;
{TVQ]G%'b
SortUtil： Memb`3
1/tyne=m
package org.rut.util.algorithm; ym;I(TC+
l0K_29^
import org.rut.util.algorithm.support.BubbleSort; V M{Sng
import org.rut.util.algorithm.support.HeapSort; JKY
import org.rut.util.algorithm.support.ImprovedMergeSort; lKBI3oYn
import org.rut.util.algorithm.support.ImprovedQuickSort; q5G`N>"V
import org.rut.util.algorithm.support.InsertSort; Y1-=H)G
import org.rut.util.algorithm.support.MergeSort; W!R7D%nX
import org.rut.util.algorithm.support.QuickSort; 's\rQ-TV
import org.rut.util.algorithm.support.SelectionSort; %%+@s
import org.rut.util.algorithm.support.ShellSort; h )% e
P/,ezVb=
/** Y;1s=B9
* @author treeroot u-u:7VtH0=
* @since 2006-2-2 U7xKu75G1
* @version 1.0 o\N^Uu
*/ Egi(z9|Pp
public class SortUtil { 9ePR6WS4
public final static int INSERT = 1; r*kz`cJ
public final static int BUBBLE = 2; :qvA'.L/;z
public final static int SELECTION = 3; R+5yyk\
public final static int SHELL = 4; ~sVbg$]\G
public final static int QUICK = 5; ^5q}M'
public final static int IMPROVED_QUICK = 6; )CoJ9PO7
public final static int MERGE = 7; TdL/tg!
public final static int IMPROVED_MERGE = 8; y3Ul}mVhA
public final static int HEAP = 9; wJg&OQc9
C {G647
public static void sort(int[] data) { ? ]H'egG6
sort(data, IMPROVED_QUICK); X3j|J/
} [!j;jlh7},
private static String[] name={ =l4F/?u]f@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z5`U+ (
}; %*^s%NI
@@5JuI-!
private static Sort[] impl=new Sort[]{ {`+:!X
new InsertSort(), jL*s(Yq
new BubbleSort(), gg&Dej2{
new SelectionSort(), 7e:7RAX
new ShellSort(), "Z#MR`;&29
new QuickSort(), }+fBJ$
new ImprovedQuickSort(), ,T8fo\a4
new MergeSort(), )(h<vo)-zX
new ImprovedMergeSort(), c8oE,-~
new HeapSort() +:3p*x%1H
}; )VeeAu)p
5 J 7XVe>
public static String toString(int algorithm){ BYZllwxwTE
return name[algorithm-1]; @N6KZn|R
} nnuJY$O;M
b8h6fB:2
public static void sort(int[] data, int algorithm) { ~EO=;a_
impl[algorithm-1].sort(data); ge[&og/$
} 97n,^t2F\
=/kT|
public static interface Sort { \]qwD m/
public void sort(int[] data); qz }PTx
} A&C?|M?M
q)!G5j3
public static void swap(int[] data, int i, int j) { q]DE\*@
int temp = data; F>ps&h
data = data[j]; Qy\Koo
data[j] = temp; e^h4cC\^
} '<aFd)-
} lTZcbaO?]