[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; gXI_S9z
} v}A] R9TY
int i1=l; Y?%MPaN:
int i2=mid+1; RBr
for(int cur=l;cur<=r;cur++){ JfKhYRl
if(i1==mid+1) z/ T|
data[cur]=temp[i2++]; 3Zg=ZnF
else if(i2>r) S;NChu?8
data[cur]=temp[i1++]; WhE5u&`
else if(temp[i1] data[cur]=temp[i1++]; yGgHd=?
else `}k!SqG
data[cur]=temp[i2++]; 9pE)S^P
} %8`zaa
} 95(c{ l/
mmY~V:,Kd
} JiZ9ly(G
;nLQ?eS\
改进后的归并排序: (HLy;^#R
!? ?Cxs'
package org.rut.util.algorithm.support; lnbw-IE!
"V~U{(Z
import org.rut.util.algorithm.SortUtil; 6_;3
xp/u, q
/** \s&w0V`Y
* @author treeroot y[qW>
* @since 2006-2-2 RTA9CR)JP4
* @version 1.0 H;*:XLPF
*/ !IoD";Oi
public class ImprovedMergeSort implements SortUtil.Sort { }llzO
pX6T7
private static final int THRESHOLD = 10; d(,-13
^]'p927
/* *-Lnsi^7v
* (non-Javadoc) ,qiS;2(
* &gF{<$$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S)VuT0
*/ 5gF}7D@
public void sort(int[] data) { A42At]
int[] temp=new int[data.length]; &IT'%*Y:V
mergeSort(data,temp,0,data.length-1); S7aSUt!
} Ul@ZCv+
qfC9 {gu
private void mergeSort(int[] data, int[] temp, int l, int r) { 0J$wX yh
int i, j, k; ""Drf=]
int mid = (l + r) / 2; 1>a^Q
if (l == r) ;}f%bE
return; rZGbU&ZM8
if ((mid - l) >= THRESHOLD) cWFvYF
mergeSort(data, temp, l, mid); ;oh88,*'
else Q C~~
insertSort(data, l, mid - l + 1); "4g1I<
if ((r - mid) > THRESHOLD) i+(`"8W
mergeSort(data, temp, mid + 1, r); "R*B~73
else `<HY$PAe
insertSort(data, mid + 1, r - mid); P%Q}R[Q
kGc)Un?'{U
for (i = l; i <= mid; i++) { }E>2U/wpXY
temp = data; Km+29
} fhH* R*4
for (j = 1; j <= r - mid; j++) { $ }B"u;:SU
temp[r - j + 1] = data[j + mid]; "T}J|28Z
} V2,.@j#
int a = temp[l]; nkJ*$cT1o
int b = temp[r]; @GnsW;$*~.
for (i = l, j = r, k = l; k <= r; k++) { 8>pFpS
if (a < b) { [n74&EH
data[k] = temp[i++]; ]-x#zp;=
a = temp; \vQ_:-A
} else { ;i:Uoyi
data[k] = temp[j--]; BC@"WlD
b = temp[j]; aE,x>I 7 D
} /f%u_ 8pV%
} P]y2W#Rs
} DMf^>{[
d_5h6Cz4
/** ~d{E>J77j
* @param data !\awT
* @param l Qs%f6rL
* @param i B|,6m 3.
*/ KL5rF,DME
private void insertSort(int[] data, int start, int len) { ~PlwPvWo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5I&^n0h|&
} Iu1P}R>C
} 9s*Lzi[}
} E\V>3rse
} ni%^w(J3Q
;"Ot\:0
堆排序： cK-!Evv
zLxWyPM0;
package org.rut.util.algorithm.support; ?erDP8
2lp.Td`{
import org.rut.util.algorithm.SortUtil; HNh=igu
Rdnd|
/** "9WP^[
* @author treeroot IZ2#jSDn
* @since 2006-2-2 uxh4nyE
* @version 1.0 k*M{?4
*/ YRYrR|I
public class HeapSort implements SortUtil.Sort{ Ok:@F/ v
DJn>. Gd
/* (non-Javadoc) 'HqAm$V+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >_F&oA#
*/ yY"%6k,ZB
public void sort(int[] data) { #;mZ3[+i5
MaxHeap h=new MaxHeap(); Oi7=z?+j
h.init(data); ;<&s_C3
for(int i=0;i h.remove(); Tu6he8Q-
System.arraycopy(h.queue,1,data,0,data.length); p!Gf^
} ?` `+OH
OOk53~2id
private static class MaxHeap{ TTOd0a
Q'|cOQX
void init(int[] data){ G*"N}M1)
this.queue=new int[data.length+1]; Hb]7>[L
for(int i=0;i queue[++size]=data; kb%W3c9HO
fixUp(size); !Uj !Oy
} +Nza@B d
} cnIy*!cJs
[9LYR3 p
private int size=0; (K?[gI
hh8UKEM-
private int[] queue; 17 j7j@s)
]&r/H17
public int get() { Yd<~]aXM
return queue[1]; -d[x09
} S`6'~g
V)a6H^l
public void remove() { 7=<PVJ*/
SortUtil.swap(queue,1,size--); M>]%Iu
fixDown(1); \JyWKET::_
} gai?LXM l}
file://fixdown #Se
private void fixDown(int k) { /=3g-$o{`
int j; Ha/\&Z(
while ((j = k << 1) <= size) { q7)$WXe2LM
if (j < size %26amp;%26amp; queue[j] j++; _ssHRbE
if (queue[k]>queue[j]) file://不用交换 NeK:[Q@je
break; i#-Jl7V[a
SortUtil.swap(queue,j,k); #dl8+
k = j; ow$#kQ&R O
} @O3w4Zs
} w_{z"VeD
private void fixUp(int k) { +}Q4 g]M8
while (k > 1) { c:$:j,i}
int j = k >> 1; .xk<7^ZD
if (queue[j]>queue[k]) q?MYX=Y6
break; 4kz8U
SortUtil.swap(queue,j,k); &FZe LIt
k = j; 9iOlR=-*
} L;`4"
} H?~u%b@
@qe>ph[UA
} 43)9iDmJ8<
'&9a%
} B{K'"uC
PIrUls0}
SortUtil： Q72wg~%w
f,-|"_5;
package org.rut.util.algorithm; cPN7^*
yf8UfB#a
import org.rut.util.algorithm.support.BubbleSort; T4#knSIlh
import org.rut.util.algorithm.support.HeapSort; }(],*^'u-
import org.rut.util.algorithm.support.ImprovedMergeSort; JZv]tJWq
import org.rut.util.algorithm.support.ImprovedQuickSort; QO?ha'Sl
import org.rut.util.algorithm.support.InsertSort; /9yiMmr5W
import org.rut.util.algorithm.support.MergeSort; $yc,D=*Isi
import org.rut.util.algorithm.support.QuickSort; 'qP^MdoE%~
import org.rut.util.algorithm.support.SelectionSort; HOD2/
import org.rut.util.algorithm.support.ShellSort; tFSdi.|G=
k}O|4*.BT
/** 9D| FqU |
* @author treeroot R utW{wh
* @since 2006-2-2 .kYzB.3@]
* @version 1.0 +Va?wAnr
*/ ,-1$Vh@wM
public class SortUtil { GS$k
public final static int INSERT = 1; w|Mj8Lc+
public final static int BUBBLE = 2; e7?W VV,
public final static int SELECTION = 3; A,og9<+j-
public final static int SHELL = 4; lxmS.C
public final static int QUICK = 5; .{;!bw
public final static int IMPROVED_QUICK = 6; <s2l*mc
public final static int MERGE = 7; =;a4 Dp
public final static int IMPROVED_MERGE = 8; V*m)h
public final static int HEAP = 9; XH2SEeh
#wd \&
public static void sort(int[] data) { .;F+ QP0
sort(data, IMPROVED_QUICK); N4v)0
} 2(rZ@Wl
private static String[] name={ &B2c]GoW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w2,T.3DT
}; =%u|8Ea*`
NY;UI(<]
private static Sort[] impl=new Sort[]{ F@*lR(4C
new InsertSort(), ?% X9XH/!
new BubbleSort(), `%XgGHiE
new SelectionSort(), ^kD?0Fm
new ShellSort(), ^VIUXa
new QuickSort(), VoyH:
new ImprovedQuickSort(), M"vcF5q
new MergeSort(), c6uKKh>
new ImprovedMergeSort(), }F`Tp8/&j
new HeapSort() 6C0_. =7#
}; Wu4Nq+
"[?/I3{E
public static String toString(int algorithm){ ?xo,)``
return name[algorithm-1]; i]-gO
} F^NR qE
ZYt __N
public static void sort(int[] data, int algorithm) { <D dHP
impl[algorithm-1].sort(data); 0V#t ;`Q3
} 7, 13g)
9HE(*S
public static interface Sort { G}-.xj]
public void sort(int[] data); 4d 3Znpf
} &v-V_.0(H
Uaj=}p\+.p
public static void swap(int[] data, int i, int j) { L@4zuzmlb
int temp = data; LA?\~rh!
data = data[j]; \l:g{GnoT
data[j] = temp; by U\I5
} iXm||?Rnx
} ^0|NmMJ]