[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; ]9PQKC2&
} Me2qOc^Z-
int i1=l; sL!+&Id|
int i2=mid+1; ',bSJ4)Y
for(int cur=l;cur<=r;cur++){ zPc kM)
if(i1==mid+1) 2Fc>6]:*
data[cur]=temp[i2++]; SUN!8 qFA
else if(i2>r) cnraNq1
data[cur]=temp[i1++]; EPiZe-
else if(temp[i1] data[cur]=temp[i1++]; jt`\n1q)
else _%]x-yH!@
data[cur]=temp[i2++]; @;t6Slc"~
} 05ovz
} *Y`c.n"
vhd+A
} B>UF dj]-
{,+MaH
改进后的归并排序: 3L^]J}|
@/W~lJ!e
package org.rut.util.algorithm.support; >m+Fm=
/C
import org.rut.util.algorithm.SortUtil; `'G1"CX
1"wZ [.
/** ?rxq//S2
* @author treeroot UUR+PfY
* @since 2006-2-2 u3vM!
* @version 1.0 9p4=iXfR
*/ 7CDp$7v2
public class ImprovedMergeSort implements SortUtil.Sort { *O'`&J
6olJ7`*
private static final int THRESHOLD = 10; Pr'Ij
EECuJ+T
/* 2(i|n=
* (non-Javadoc) `e4gneQY
* sd&^lpH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $5\+QW
*/ ac!!1lwA
public void sort(int[] data) { YhQ%S}
int[] temp=new int[data.length]; N;S1s0FN
mergeSort(data,temp,0,data.length-1); {1;R&
} p6X-P%s
B+2EIaI
private void mergeSort(int[] data, int[] temp, int l, int r) { @hwe
int i, j, k; sR;u#".
int mid = (l + r) / 2; Xv<K>i>k
if (l == r) ({0:1*lF@
return; *CCh\+S7m
if ((mid - l) >= THRESHOLD) * zt?y
mergeSort(data, temp, l, mid); H b?0?^#
else bbs'>D3
insertSort(data, l, mid - l + 1); :Z&<5
if ((r - mid) > THRESHOLD) =/Ph]f9
mergeSort(data, temp, mid + 1, r); IXv9mr?H}
else A)_HSIVi
insertSort(data, mid + 1, r - mid); /m|U2rrqb
7S2"e[-x
for (i = l; i <= mid; i++) { %%sJ+)
temp = data; Z=dM7Lj*
} B}+li1k
for (j = 1; j <= r - mid; j++) { Qs,4PPEg
temp[r - j + 1] = data[j + mid]; LYO2L1u)
} -*$ s ;G#
int a = temp[l]; Zo<j"FG
int b = temp[r]; hQ (84u
for (i = l, j = r, k = l; k <= r; k++) { G^Va$ike
if (a < b) { Mp?L9
data[k] = temp[i++]; GK=b
a = temp; Xp[xO0
} else { Z;y(D_;_
data[k] = temp[j--]; Y?ZzFd,i&
b = temp[j]; NXX/JJ+w
} z/,&w_8,:
} L+8{%\UPd
} *WfQi8
`\$EPUM
/** MdDL?ev
* @param data 5?q6g
* @param l Y94S!TbB
* @param i #z+?t
*/ {zalfw{+
private void insertSort(int[] data, int start, int len) { ' eh }t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a"&cm'\lL
} +c$:#9$ |
} ZeqsXz
} e2yCWolmTS
} :gn&wi
Eh*(N(`
堆排序： jG{OLF6 !
>f'aW
package org.rut.util.algorithm.support; ejc>
zGNmc7
import org.rut.util.algorithm.SortUtil; K /$-H#;N
=~>g--^U
/** WbwwI)1
* @author treeroot wC?$P
* @since 2006-2-2 /gn!="J
* @version 1.0 nS](d2
*/ i5aY{3!
public class HeapSort implements SortUtil.Sort{ G@txX '
~@DdN5
/* (non-Javadoc) !t+ 3DMPn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4]#$YehM5
*/ 7,zE?KG /
public void sort(int[] data) { wYr*('uT
MaxHeap h=new MaxHeap(); d(yTz&u)
h.init(data); 6Yl+IP];i
for(int i=0;i h.remove(); e%EO/ 2"
System.arraycopy(h.queue,1,data,0,data.length); @nAl*#M*D
} "W~vSbn7
R.cR:fA
private static class MaxHeap{ >p'{!k
]!j%Ad
void init(int[] data){ ]T6pH7~
this.queue=new int[data.length+1]; v[r8-0c
for(int i=0;i queue[++size]=data; 3l"8_zLP
fixUp(size); ;W]9DBAB
} 3W%j^nM
} s(KSN/
&$ud;r#
private int size=0; .TCDv4?
pD('6C;
private int[] queue; !hFhw1
dI|D c
public int get() { jweX"G54R
return queue[1]; rsq?4+\
} ac\([F-
Gt+rVJ=v
public void remove() { o7s!ti\G
SortUtil.swap(queue,1,size--); kD0bdE|
fixDown(1); +I?k8',pi
} 4,>9N9.?9
file://fixdown P)cEYk
private void fixDown(int k) { !6x7^E;c
int j; &B]1 VZUp
while ((j = k << 1) <= size) { 9VanR ::XX
if (j < size %26amp;%26amp; queue[j] j++; `ZbFky{
if (queue[k]>queue[j]) file://不用交换 !*f$*,=^
break; QIg'js$W
SortUtil.swap(queue,j,k); C T\@>!'f
k = j; 7WwE] ^M
} Cv}^]_`Q
} XDHi4i47`o
private void fixUp(int k) { 050,S`%<g8
while (k > 1) { gJCZ9{Nl
int j = k >> 1; }8POm#
if (queue[j]>queue[k]) NJ]3qH
break; Y%eq2%
SortUtil.swap(queue,j,k); Vn_~ |-Wt
k = j; Kk*8
} l*6Zh"o:
} #wo *2(
\h_q]
} xH&hs$=
%~y>9K
} Sg4{IU
|-)8=QDz)r
SortUtil： #=VYq4B=
9?8PMh.
package org.rut.util.algorithm; b+|3nc!
2:_6nWl
import org.rut.util.algorithm.support.BubbleSort; =#v? }JG
import org.rut.util.algorithm.support.HeapSort; mBE&>}G<
import org.rut.util.algorithm.support.ImprovedMergeSort; ?^M,Mt
import org.rut.util.algorithm.support.ImprovedQuickSort; *yaS^k\
import org.rut.util.algorithm.support.InsertSort; 0y6M;"&~E
import org.rut.util.algorithm.support.MergeSort; &!OEd]
import org.rut.util.algorithm.support.QuickSort; dFF=-_O>
import org.rut.util.algorithm.support.SelectionSort; yIrJaS-
import org.rut.util.algorithm.support.ShellSort; eZaSV>27
I/%v`[
/** ?C#E_
* @author treeroot y)U?.@
* @since 2006-2-2 #c5jCy}n
* @version 1.0 fx(h fz
*/ Pc_aEBq
public class SortUtil { D}q"^"#T
public final static int INSERT = 1; }f]Y^>-Ux
public final static int BUBBLE = 2; _'LZf=V0
public final static int SELECTION = 3; -(t7>s
public final static int SHELL = 4; pF4Z4?W
public final static int QUICK = 5; ;8eKAh
public final static int IMPROVED_QUICK = 6; __2<v?\
public final static int MERGE = 7; ,wwO0,"y7
public final static int IMPROVED_MERGE = 8; y TD4![
public final static int HEAP = 9; fT|A^
,/D}a3JD
public static void sort(int[] data) { Z*q9vX
sort(data, IMPROVED_QUICK); gf1+yJ^d!
} i=cST8!8N
private static String[] name={ KWZhCS?[(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ])o{!}QUl\
}; %/"n(?$W
Aeb(b+=
private static Sort[] impl=new Sort[]{ ~/]]H;;^u
new InsertSort(), #3QPcoxa
new BubbleSort(), qD4]7"9
new SelectionSort(), S0)JIrrHC
new ShellSort(), &CQO+Yr$l
new QuickSort(), Y.\x.Hg
new ImprovedQuickSort(), $[A\i<#
new MergeSort(), D]]wJQU2
new ImprovedMergeSort(), &cSVOsi
new HeapSort() Ic9L@2m
}; ,-4NSli
kIVQ2hmv
public static String toString(int algorithm){ H*'1bLzq
return name[algorithm-1]; iCE!TmDT
} jYFJk&c
\&5V';
public static void sort(int[] data, int algorithm) { MQQm3VaKS
impl[algorithm-1].sort(data); R7kkth
} `oJQA$UD
m{/( 3
public static interface Sort { %bAQ>E2;m
public void sort(int[] data); +cfEyiub
} :<t=??4m
MLu!8dgI
public static void swap(int[] data, int i, int j) { W<r<K=`5P
int temp = data; >ESVHPj]
data = data[j]; #*'Qm A
data[j] = temp; Dz(\ ?
} S^eem_C
} y|2<Vc