[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; EXW 6yXLV
} wJos'aTmE
int i1=l; O4d^ig-xaH
int i2=mid+1; xDA,?i;T 0
for(int cur=l;cur<=r;cur++){ M |Q
if(i1==mid+1) JeTrMa2
data[cur]=temp[i2++]; EM54
else if(i2>r) wy_;+ 'Y
data[cur]=temp[i1++]; e|5B1rMM
else if(temp[i1] data[cur]=temp[i1++]; &Wv`AoV
else "o#)vA`
data[cur]=temp[i2++]; :KV,:13`D
} 'x,GI\;?
} E}b>7L&w
XJlDiBs9=Q
} YNgR1:l
b!5tFX;J
改进后的归并排序: OwiWnS<
gvc' $9%
package org.rut.util.algorithm.support; G<u.+V
*VC4s`<
import org.rut.util.algorithm.SortUtil; Hu9-<upc&
sx(l
/** 9HNh*Gc=
* @author treeroot fyg~KF}
* @since 2006-2-2 5lHN8k=mm2
* @version 1.0 snTJe[^d
*/ IJ_'w[k
public class ImprovedMergeSort implements SortUtil.Sort { ~b$z\|Y
xL39>PB
private static final int THRESHOLD = 10; OZC/+"\,
RZ)vU'@kx
/* 1f@U:<:
* (non-Javadoc) uWR,6\_jY
* uU[[[LQq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bV )PT`-,
*/ J!A/r<
public void sort(int[] data) { WrHgF*[
int[] temp=new int[data.length]; [Z5}2gB&
mergeSort(data,temp,0,data.length-1); 9B#)h)h(=
} CdzkMVH
ndKvJH4
private void mergeSort(int[] data, int[] temp, int l, int r) { *<.WL"Qhl
int i, j, k; )Vg{Y [!
int mid = (l + r) / 2; rq'##`H
if (l == r) 3vRLg b
return; #zSi/r/=1
if ((mid - l) >= THRESHOLD) TM/|K|_
mergeSort(data, temp, l, mid); B'KXQa-$O
else =N*%f%
insertSort(data, l, mid - l + 1); NDe[2
if ((r - mid) > THRESHOLD) @ yg|OA}
mergeSort(data, temp, mid + 1, r); Z}LOy^TL
else @\6nXf
insertSort(data, mid + 1, r - mid); %7C%`)T]
e}?1T7NPG]
for (i = l; i <= mid; i++) { s`Be#v
temp = data; vh. Wm?qQ
} *,pZ fc
for (j = 1; j <= r - mid; j++) { `b^#quz
temp[r - j + 1] = data[j + mid]; +;:aG6q+
} "9U+h2#]
int a = temp[l]; j:v~MrQ7|
int b = temp[r]; mI?* Z%>g
for (i = l, j = r, k = l; k <= r; k++) { 7}#*3*]
if (a < b) { y?*[}S
data[k] = temp[i++]; W>q*.9}Y"
a = temp; 5I)~4.U|,m
} else { U+9-li
data[k] = temp[j--]; j1;_w
b = temp[j]; ?O<`h~'$+
} (^tr}?C
} >Bh)7>`3c
} ]5o0
_A;vSp.`
/** n!kk~65|
* @param data ^(dGO)/
* @param l E'&OOEMN-
* @param i &AQg'|
*/ KlVi4.]
private void insertSort(int[] data, int start, int len) { >YJ8u{Z{o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]/ZA/:Oa+
} Vp(D|}P
} 8m/FKO (r
} hapB! ~M?
} HsjELbH
p@cfY]<7
堆排序： 5eiZs
q9>Ls-k
package org.rut.util.algorithm.support; b!4N)t>gl
2d5}`>
import org.rut.util.algorithm.SortUtil; #sz]PZ\
2A*X Hvwb
/** )Y&MIJ7>@
* @author treeroot ]^yV`Z8
* @since 2006-2-2 #Dj"W8'zh
* @version 1.0 ?Kx6Sf<i
*/ 95.qAFB1
public class HeapSort implements SortUtil.Sort{ L~*|,h
45Nv_4s
/* (non-Javadoc) g:3d<CS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r,`Z.A
*/ y'J:?!S,Yu
public void sort(int[] data) { N5q}::Odc
MaxHeap h=new MaxHeap(); u"`5
h.init(data); (TT3(|v
for(int i=0;i h.remove(); :DOr!PNA
System.arraycopy(h.queue,1,data,0,data.length); o9KyAP$2
} bc3|;O
[+hy_Nc$
private static class MaxHeap{ Ij;==f~G
x !#Ma
void init(int[] data){ ]k[Q]:q
this.queue=new int[data.length+1]; 8BYIxHHz
for(int i=0;i queue[++size]=data; .DgoOo%?"
fixUp(size); e={k.y}x}
} yPf?"W
} wFK:Dp_^
MuDFdbtR
private int size=0; io1S9a(y
\]Y\P~n
private int[] queue; l 8O"w&
:3111}>c
public int get() { -kG3k> by_
return queue[1]; h|J;6Sm@
} ]4Nvh\/P9
?8Hn{3X
public void remove() { ]%gp?9wy
SortUtil.swap(queue,1,size--); gIV3n#-{L
fixDown(1); -vyIOH,
} 07.nq;/R
file://fixdown 3c01uObTL
private void fixDown(int k) { "-G&=(
int j; u/z,92mmS
while ((j = k << 1) <= size) { *0=fT}&!
if (j < size %26amp;%26amp; queue[j] j++; Nc G,0K
if (queue[k]>queue[j]) file://不用交换 KotPV
break; +90u!r^v
SortUtil.swap(queue,j,k); AkxH
k = j; #=X)Jx~
} 9uA, +
} Y*5Z)h 1
private void fixUp(int k) { 7ZS>1
while (k > 1) { UJ7'JBT=k
int j = k >> 1; jK3giT
if (queue[j]>queue[k]) L_tjcfVo
break; qru2h #
SortUtil.swap(queue,j,k); PYdIP\<V
k = j; 5."5IjZu
} {F;,7Kn+l
} ' oBo|
l'|E,N>X
} \BN|?r$a
wY' "ab
} M%7`8KQ
@''&nRC1
SortUtil： w@87]/4Rq
i?ZA x4D
package org.rut.util.algorithm; oR-O~_)U
/0Z|+L9Jo
import org.rut.util.algorithm.support.BubbleSort; " <<A
import org.rut.util.algorithm.support.HeapSort; 7sj<|g<h(_
import org.rut.util.algorithm.support.ImprovedMergeSort; U5|B9%:&
import org.rut.util.algorithm.support.ImprovedQuickSort; G1kDM.L
import org.rut.util.algorithm.support.InsertSort; l<u{6o
import org.rut.util.algorithm.support.MergeSort; }16&1@8
import org.rut.util.algorithm.support.QuickSort; l*$WX=h6n
import org.rut.util.algorithm.support.SelectionSort; \eEds:Hg
import org.rut.util.algorithm.support.ShellSort; WLE%d]'%M
5i^`vmK
/** \M+MDT&
* @author treeroot `>%-
* @since 2006-2-2 7;^((.]ln
* @version 1.0 {?w"hjy
*/ MKomq
public class SortUtil { BqQ] x'AF
public final static int INSERT = 1; YKc>6)j
public final static int BUBBLE = 2; R78!x*U}
public final static int SELECTION = 3; 3 t/ R2M
public final static int SHELL = 4; 6hp{,8|D"m
public final static int QUICK = 5; I|H,)!Z
public final static int IMPROVED_QUICK = 6; 5i|s>pD4z1
public final static int MERGE = 7; ):/,w!1
public final static int IMPROVED_MERGE = 8; OWqrD@
public final static int HEAP = 9; -UJ?L
3voW
public static void sort(int[] data) { k69kv9v@J
sort(data, IMPROVED_QUICK); ~D*b3K8X
} <'W=]IAV
private static String[] name={ ldK>HxM%Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _Q> "\_,
}; }6<)yW}U
GaHA%
private static Sort[] impl=new Sort[]{ K*[9j 0
new InsertSort(), M|ms$1x
new BubbleSort(), !IN@i:m
new SelectionSort(), DUqJ y*F(
new ShellSort(), w nWgy4:
new QuickSort(), j+$M?Z^
new ImprovedQuickSort(), oE$hqd s
new MergeSort(), b9`iZ
new ImprovedMergeSort(), Jth=.9mrM
new HeapSort() hBjVe?{
}; i^R{Ul[
vT%qILTrQf
public static String toString(int algorithm){ ;8BA~,4l
return name[algorithm-1]; \WcB9
} [ne" T
+)zDA:2Wa"
public static void sort(int[] data, int algorithm) { I|Z/`9T
impl[algorithm-1].sort(data); Np$z%ewK.
} ^,+nef?=
6nc0=~='$
public static interface Sort { FW_G\W.
public void sort(int[] data); Vz'HM$
} UkZ\cc}aC/
/oFc03d
public static void swap(int[] data, int i, int j) { J,RDTXqn
int temp = data; k5wi'
data = data[j]; !5&%\NSv
data[j] = temp; s1{[{L3
} un6cD$cHr
} `%oIRuYG]j