[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; hsUP5_
} !B3lsXLSY
int i1=l; zjrr*iw
int i2=mid+1; 7o4 vf~
for(int cur=l;cur<=r;cur++){ `(9B(&t^,
if(i1==mid+1) cs%NsnZ
data[cur]=temp[i2++]; $Di2BA4Di
else if(i2>r) d">Ya !W
data[cur]=temp[i1++]; m9Uoq[1
else if(temp[i1] data[cur]=temp[i1++]; *0^t;A+
else |UO1vA@
data[cur]=temp[i2++]; FDAREE\j
} jnoFNIW
} -e{H8ro
DvuL1MeKo
} Vo%UiVHy
LQMVC^G
改进后的归并排序: A_t<SG5
pP'-}%
package org.rut.util.algorithm.support; "iof -b=ys
h,@x5q>g
import org.rut.util.algorithm.SortUtil; &\C{,:[
3\,TI`^C
/** fuH Dif,
* @author treeroot iDO~G($C
* @since 2006-2-2 ]'aGoR
* @version 1.0 /N@0qQ
*/ (WW,]#^
public class ImprovedMergeSort implements SortUtil.Sort { Pc]c8~
|7zm!^t$
private static final int THRESHOLD = 10; |jV4]7Luq
'FBvAk6
/* K@{jY\AZNx
* (non-Javadoc) (D8'qx-M
* p;n)YY$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {kJ[)7
*/ 0nAeeVz|
public void sort(int[] data) { CSU>nIE0
int[] temp=new int[data.length]; NUL~zb
mergeSort(data,temp,0,data.length-1); &F#X0h/m=
} yB.6U56
*OF7{^~&
private void mergeSort(int[] data, int[] temp, int l, int r) { ]Ly)%a32
int i, j, k; WaMn[/{
int mid = (l + r) / 2; y i@61XI
if (l == r) 8}\"LXRbo
return; JmYi&
if ((mid - l) >= THRESHOLD) +[2lS54"W4
mergeSort(data, temp, l, mid); <{-DYRiN
else g1J]z<&
insertSort(data, l, mid - l + 1); Q|G[9HBI
if ((r - mid) > THRESHOLD) <E\BKC%M
mergeSort(data, temp, mid + 1, r); 3!$rp- !<)
else y6jTT%
insertSort(data, mid + 1, r - mid); hV8A<VT
cRg$~rYd
for (i = l; i <= mid; i++) { 8'cDK[L
temp = data; mI`dZ3h
} 9)YG)A~<
for (j = 1; j <= r - mid; j++) { o!H"~5Trv!
temp[r - j + 1] = data[j + mid]; x`eYCi
} (~#PzE:
int a = temp[l]; cL WM]\Y
int b = temp[r]; z(%Zji@!N
for (i = l, j = r, k = l; k <= r; k++) { *@Qt*f
if (a < b) { "1#,d#Q$
data[k] = temp[i++]; 3> fuH'=
a = temp; 5g&'n
} else { c&_3"2:
data[k] = temp[j--]; be@MQ}6>
b = temp[j]; [}AcCXg`L
} n+i}>3'A
} 0CN.gu
} A=3U4L
0s4j>
/** :D/R
* @param data WMC6dD_6e
* @param l 3~S~)quwP
* @param i k4l72 'P
*/ x-W0 h
private void insertSort(int[] data, int start, int len) { D6m>>&E['
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cv=0&S.
} oyd{}$71d
} A6Qi^TI
} PQs9@]w[
} C/$IF M<
I'j?T.
堆排序： /za,&7sf
](ninSX1w
package org.rut.util.algorithm.support; u/zfx;K
cP Y^Bf5)
import org.rut.util.algorithm.SortUtil; aD:+,MZ
<*\J 6:^n
/** *5NffiA}-
* @author treeroot g$97"d'
* @since 2006-2-2 dvf*w:5K!
* @version 1.0 7D^A:f
*/ *Zvw&y*
public class HeapSort implements SortUtil.Sort{ prWid3}
c2U>89LlZ
/* (non-Javadoc) BCj&z{5"7e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bM'AD[
*/ B+<k,ad
public void sort(int[] data) { rx"zqm9 }u
MaxHeap h=new MaxHeap(); GB=q}@&8p
h.init(data); qRFN@ID$
for(int i=0;i h.remove(); : ?V;
System.arraycopy(h.queue,1,data,0,data.length); 3,[2-obmi
} `#]\Wnp~y
|bk*Lgkzw
private static class MaxHeap{ f.= E.%
xI@~Ig
void init(int[] data){ u%pief
this.queue=new int[data.length+1]; MXy{]o_H~
for(int i=0;i queue[++size]=data; t'J fiGM
fixUp(size); nqBuC
} l;.BlHyu
} "|.(yN
cGp^;> ]M
private int size=0; xYT.J 6
xeI{i{8
private int[] queue; QP#Wfk(C
a5-\=0L~
public int get() { "" U_|JH-
return queue[1]; pd#/;LT
} )hug<D *h
HhL%iy1
public void remove() { 9zJ`;1
SortUtil.swap(queue,1,size--); 4i,SiFKB
fixDown(1); zqh{=&Tjx
} K(gj6SrjV
file://fixdown +a/o)C{
private void fixDown(int k) { 0R& U18)y
int j; @m V C
while ((j = k << 1) <= size) { x/=j$oA
if (j < size %26amp;%26amp; queue[j] j++; >v[(w1?rX
if (queue[k]>queue[j]) file://不用交换 /<0D E22
break; +&OqJAu
SortUtil.swap(queue,j,k); yjd'{B9{
k = j; ??Zmj:8E'
} A ? M]5d
} ~t={ \,X\
private void fixUp(int k) { YJ$ewK4E#.
while (k > 1) { L2'd sOn
int j = k >> 1; yf)`jPM1<
if (queue[j]>queue[k]) (GG"'bYk
break; l,.?-|Poa
SortUtil.swap(queue,j,k); d8HB2c5y0i
k = j; #-T.@a1X
} |a{]P=<q
} vC:b?0s#(
d|]O<]CG_
} J\3} il N
GYC&P]
} gE&W6z0fJ
v9U(sEDq
SortUtil： JtpY][}"~3
IY6_JGe_w
package org.rut.util.algorithm; ~lqGnNhh7
0j(jJAE.
import org.rut.util.algorithm.support.BubbleSort; jJ!-hg4?]
import org.rut.util.algorithm.support.HeapSort; J4"swPf
import org.rut.util.algorithm.support.ImprovedMergeSort; xn@0pL3B~
import org.rut.util.algorithm.support.ImprovedQuickSort; o^Ysp&#p
import org.rut.util.algorithm.support.InsertSort; W@,p9=425
import org.rut.util.algorithm.support.MergeSort; hF"g91P
import org.rut.util.algorithm.support.QuickSort; T:dm0iau
import org.rut.util.algorithm.support.SelectionSort; 4;RCPC
import org.rut.util.algorithm.support.ShellSort; ShJK&70O
k0_$M{@Y
/** ,6;xr'[o*
* @author treeroot Xexe{h4t_>
* @since 2006-2-2 JhCkkw
* @version 1.0 GrR0RwnH)?
*/ ~59`S#ax/l
public class SortUtil { x XM!E 8
public final static int INSERT = 1; PCPf*G>
public final static int BUBBLE = 2; {R-82%X
public final static int SELECTION = 3; X@qk>/
public final static int SHELL = 4; ^mueFw}\
public final static int QUICK = 5; ncattp
public final static int IMPROVED_QUICK = 6; ^2^|AXNES
public final static int MERGE = 7; ]1d,O^S
public final static int IMPROVED_MERGE = 8; #RM3^]h
public final static int HEAP = 9; B>Cs&}Y!
eR-=<0Iw;
public static void sort(int[] data) { ^'&iYV
sort(data, IMPROVED_QUICK); X#DL/#z k
} sr+gD*@h
private static String[] name={ px_s@>l`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3X$Q,
}; LMFK3Gd[
TTZ['HP oI
private static Sort[] impl=new Sort[]{ 2K]IlsMO&
new InsertSort(), K)/!&{7n}a
new BubbleSort(), |,;twj[?4
new SelectionSort(), cXS;z.M\_
new ShellSort(), 7k[pvd|L
new QuickSort(), uZ\wwYY#M
new ImprovedQuickSort(), f4'El2>-86
new MergeSort(), _k_>aG23
new ImprovedMergeSort(), .QXG"R
new HeapSort() u3Usq=Ij{
}; "($Lx
dUoWo3r=
public static String toString(int algorithm){ 'u(=eJ@1
return name[algorithm-1]; Cs:+93w
} cgs3qI
X-kXg)!Bg
public static void sort(int[] data, int algorithm) { ;Y'8:ncDn
impl[algorithm-1].sort(data); By?nd)
} ^^7L"je]g
5^i.;>(b
public static interface Sort { i}PK$sa#c
public void sort(int[] data); 17>5#JLP
} sULIrYRA
%cH8;5U40
public static void swap(int[] data, int i, int j) { *.,"N}
int temp = data; @B,j;2eb
data = data[j]; 6exI_3A4jh
data[j] = temp; h6u2j p(+
} EKZA5J7kn
} Mv.Ciyc