[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; L9$&-A9ix
} T?#s'd
int i1=l; nfa_8
int i2=mid+1; 0W_mCV
for(int cur=l;cur<=r;cur++){ X*)?LxTj
if(i1==mid+1) '9"%@AFxZ
data[cur]=temp[i2++]; {=qEBbM
else if(i2>r) [bsXF#
data[cur]=temp[i1++]; wePI*."]
else if(temp[i1] data[cur]=temp[i1++]; fw:7U%MGv
else |SxMN%M!
data[cur]=temp[i2++]; %fBP:5%K
} 4?v$<=#21*
} r:73uRk
3Qk/ Ll
} nPcxknl(pd
a^(2q{*
改进后的归并排序: ^glX1 )
{N"*olx
package org.rut.util.algorithm.support; o:H'r7N
5 >'66gZ
import org.rut.util.algorithm.SortUtil; ]I8]mUiUH
NtqFnxm/
/** &jt02+Hj'
* @author treeroot x ~wNO/
* @since 2006-2-2 =pyVn_dg
* @version 1.0 CX]RtV!
*/ *!i,?vn
public class ImprovedMergeSort implements SortUtil.Sort { JV&Zwbu
]W+)ee|D
private static final int THRESHOLD = 10; 5`{=`
r1+c/;TpZ
/* 9uKOR7.zbo
* (non-Javadoc) D/e&7^iK
* iQu^|,tHEM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^u3*hl}YKy
*/ 'frWu6]< 4
public void sort(int[] data) { q?(A!1(u
int[] temp=new int[data.length]; }M^_Z#|,
mergeSort(data,temp,0,data.length-1); xUQdVrFU
} '^e0Ud,
'y< t/qo
private void mergeSort(int[] data, int[] temp, int l, int r) { re]%f"v:5
int i, j, k; Ndo}Tk!
int mid = (l + r) / 2; J_|7$ l/
if (l == r) 4C6=77Jr
return; )ni"qv~J
if ((mid - l) >= THRESHOLD) u IAZo;
mergeSort(data, temp, l, mid); -!@H["
else jiqi!*
insertSort(data, l, mid - l + 1); (Z5q&#f
if ((r - mid) > THRESHOLD) 93 [rL+l.Y
mergeSort(data, temp, mid + 1, r); GI}4,!^N
else SwyaYK
insertSort(data, mid + 1, r - mid); K*TnUQ
L^6"'#
for (i = l; i <= mid; i++) { eR7qE) h
temp = data; 3T"2S[gT
} VIb;96$Or
for (j = 1; j <= r - mid; j++) { 92s4u3L;
temp[r - j + 1] = data[j + mid]; BO[+E'2
} @8QFP3\1
int a = temp[l]; R_t~UTfI;
int b = temp[r]; 2@rp<&s
for (i = l, j = r, k = l; k <= r; k++) { WfRVv3Vm
if (a < b) { 52da]BW<
data[k] = temp[i++]; bh{E&1sLh
a = temp; 3gC\{y!8
} else { dv}8YH["
data[k] = temp[j--]; TihnSb
b = temp[j]; |Uc<;> l
} X";TZk
} _2wAaJvA
} AU3auBol ^
Jw2B&)k/
/** )ZQHa7V
* @param data O'"YJ,
* @param l Ii|uGxEc
* @param i pTc$+Z73
*/ #E*@/ p/
private void insertSort(int[] data, int start, int len) { nUiS<D2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J>&[J!>r
} CR%D\I$o
} c$@`P
} /TzNdIv
} %=laY_y G
lq;
堆排序： /7c2OI=\
<sm#D"GpP
package org.rut.util.algorithm.support; $5ZR[\$
eL<m.06cfY
import org.rut.util.algorithm.SortUtil; -L+\y\F
OD{5m(JwL
/** PthIdaN@
* @author treeroot `)0Rv|?
* @since 2006-2-2 or?0PEx\
* @version 1.0 &r&;<Q
*/ V*~1,6N[
public class HeapSort implements SortUtil.Sort{ ,h3269$J
J@oEV=L
/* (non-Javadoc) ?R dmKA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) );0<Odw%.
*/ d\v$%0
public void sort(int[] data) { elN{7:
MaxHeap h=new MaxHeap(); 9yh9HE
h.init(data); Hlz'a1\:O]
for(int i=0;i h.remove(); pw0Px
System.arraycopy(h.queue,1,data,0,data.length); D=jSh
} Q2JdO 6[96
RpBiE8F4
private static class MaxHeap{ AM>Yj
ck(CA(_
void init(int[] data){ <f7?PAd
this.queue=new int[data.length+1]; &?P=arU
for(int i=0;i queue[++size]=data; .}IK}A/-
fixUp(size); >+yqjXRzm
} F% F c+?
} lt@
m-:8jA?
private int size=0; 5}vRo;-
vF5wA-3&t
private int[] queue; ;k9 ?
3r,1^h
public int get() { G3Idxs
return queue[1]; 6a "VCE]
} z7OZ4R:
0!9?H1>
public void remove() { W,QnU d'N
SortUtil.swap(queue,1,size--); -9=M9}eDF
fixDown(1); L9E;Uii0
} l=oN X"l=
file://fixdown ZA*b9W
private void fixDown(int k) { 6Cz7A
int j; t/l!KdY$
while ((j = k << 1) <= size) { FY1},sq
if (j < size %26amp;%26amp; queue[j] j++; ioE66-n
if (queue[k]>queue[j]) file://不用交换 +)/Rql(lY
break; 08TaFzP81
SortUtil.swap(queue,j,k); !!?+M @
k = j; o0,UXBx
} C><<0VhU
} *(?U
private void fixUp(int k) { :z0s*,QH
while (k > 1) { LydbP17K}
int j = k >> 1; ek<PISlci
if (queue[j]>queue[k]) D6&mf2'u
break; pFpQ\xc9$
SortUtil.swap(queue,j,k); kx"hWG4
k = j; "#mXsp-ut
} *u|lmALs
} >P6^k!R1y
/'8*aUa
} Sqp;/&Ji
,!o\),N
} m#5|J@]
21[K[ %
SortUtil： tnQR<
S5:"_U
package org.rut.util.algorithm; |i,zY{GI+2
OqfhCNAY
import org.rut.util.algorithm.support.BubbleSort; Bo\a
import org.rut.util.algorithm.support.HeapSort; wx]+*Lzz
import org.rut.util.algorithm.support.ImprovedMergeSort; Ns+)Y^(5
import org.rut.util.algorithm.support.ImprovedQuickSort; =yk Rki
import org.rut.util.algorithm.support.InsertSort; R-r+=x&
import org.rut.util.algorithm.support.MergeSort; 4*p_s8> >
import org.rut.util.algorithm.support.QuickSort; 9%p7B~}E
import org.rut.util.algorithm.support.SelectionSort; _aXP ;kFMi
import org.rut.util.algorithm.support.ShellSort; ?D*Hl+iu
?$"x^=te7
/** T..N*6<X
* @author treeroot y1,?ZWTayr
* @since 2006-2-2 fP^W"y
* @version 1.0 ,wwU` U
*/ f7EIDFX>pt
public class SortUtil { &^CL]&/
public final static int INSERT = 1; +z]:CF
public final static int BUBBLE = 2; aJuj7y-
public final static int SELECTION = 3; <3SFP3^:
public final static int SHELL = 4; 2 pM
public final static int QUICK = 5; kcq9p2zKv
public final static int IMPROVED_QUICK = 6; >:Rt>po8|w
public final static int MERGE = 7; z")3_5Br
public final static int IMPROVED_MERGE = 8; p`E|SNt/W
public final static int HEAP = 9; f"5lOzj`C
&y#\1K
public static void sort(int[] data) { ^]#Ptoz^(l
sort(data, IMPROVED_QUICK); [OFTP#}c
} )1ZJ
private static String[] name={ W,9k0t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UA69_E{JCH
}; )#b}qc#`
mJ6t.%'d
private static Sort[] impl=new Sort[]{ PTuCN
new InsertSort(), N3XVT{yo
new BubbleSort(), S7?f5ux
new SelectionSort(), O+(. 29
new ShellSort(), fd!pM4"0
new QuickSort(), ~.PPf/ Z8]
new ImprovedQuickSort(), !L0E03')k
new MergeSort(), ()JYN5
new ImprovedMergeSort(), !^Z[z[
new HeapSort() 3X-{2R/ 3
}; %KabyvOl)
g[=\KrTSg
public static String toString(int algorithm){ .-C+0L1j
return name[algorithm-1]; E>l#0Zw
} 2R_opbw
N[+o[%A
public static void sort(int[] data, int algorithm) { z._C*c
impl[algorithm-1].sort(data); ?{@!!te@3v
} i#@v_^q
gqO%^b)6
public static interface Sort { b.mjQ
public void sort(int[] data); TRr4`y%
} zn2"swhq\V
>+A1 V[
public static void swap(int[] data, int i, int j) { +,vJ7
int temp = data; F?RCaj
data = data[j]; YobC'c\~9
data[j] = temp; M/8#&RycQ
} ,%)WT>
} WQIM2_=M