[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; S_lGrk\j
} ing'' _
int i1=l; Ww<Y]H$xZ<
int i2=mid+1; ;*%rFt9FK
for(int cur=l;cur<=r;cur++){ %\'=Y/yP
if(i1==mid+1) ;c 7I "?@z
data[cur]=temp[i2++]; h,LSqjf"
else if(i2>r) 5U84*RY
data[cur]=temp[i1++]; U9 iI2$
else if(temp[i1] data[cur]=temp[i1++]; H,> }t S
else J*@pM
data[cur]=temp[i2++]; J""Cgf
} lm`*x=x
} !j!w$
Y9.3`VX
} -}7$;QK&a
dL42)HP5
改进后的归并排序: @A[)\E1
%. 1/#{
package org.rut.util.algorithm.support; ]d*9@+Iu
oW~W(h!
import org.rut.util.algorithm.SortUtil; Zkp~qx
5/.W-Q\pl}
/** yi$CkG}
* @author treeroot &xGdKH
* @since 2006-2-2 jg$qp%7i%
* @version 1.0 86#l$QaK{
*/ Ejk;(rxI
public class ImprovedMergeSort implements SortUtil.Sort { /&gg].&2?
~WA@YjQ]
private static final int THRESHOLD = 10; tZ]gVgZg
c=sV"r?
/* *Y>w0k
* (non-Javadoc) -2.7Z`*(
* jKUEs75]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |\(uO|)ju
*/ a`wjZ"}'[
public void sort(int[] data) { 3kxo1eb
int[] temp=new int[data.length]; |/,SNE
mergeSort(data,temp,0,data.length-1); "uH>S+%|b
} 0i~U(qoI
#A)V
private void mergeSort(int[] data, int[] temp, int l, int r) { '_v~+
int i, j, k; (T1< (YZ
int mid = (l + r) / 2; &2ED<%hH`
if (l == r) Jv}
return; {!Qu(%
if ((mid - l) >= THRESHOLD) ^4sfVpD2!
mergeSort(data, temp, l, mid); fD!c t;UK
else G)vNMl
insertSort(data, l, mid - l + 1); )^:H{1'
if ((r - mid) > THRESHOLD) m]qw8BoU`F
mergeSort(data, temp, mid + 1, r); A-Ba%Fv
else :jTSOd[r
insertSort(data, mid + 1, r - mid); O84]J:b
hQ#e;1uD
for (i = l; i <= mid; i++) { l>6tEOXt
temp = data; $>)0t@[f
} 7. F'1oEf
for (j = 1; j <= r - mid; j++) { [CQR
temp[r - j + 1] = data[j + mid]; SaPE 1^}
} eB0exPz%
int a = temp[l]; <8WFaP3,
int b = temp[r]; (3n "a'
for (i = l, j = r, k = l; k <= r; k++) { snaAn?I4
if (a < b) { "0eX/rY%
data[k] = temp[i++]; D!`;vZ\>
a = temp; ,X!6|l8
} else { Q}#Je.;
data[k] = temp[j--]; tpWGmjfo>
b = temp[j]; xQsxc
} G+dq */
} sq$v6x sl
} OnTe_JML
5dj" UxH
/** ]\*^G@HA2
* @param data _xKn2?d8g
* @param l 7)2K6<q
* @param i F`g(vD>
*/ H07\z1?.K
private void insertSort(int[] data, int start, int len) { #eW T-m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yGR{-YwU!
} *OLqr/ yb
} 1Q@]b_"Xh
} .UPh
} /8GdCac
.`Rt
堆排序： z+MH co"
5`^@k<
package org.rut.util.algorithm.support; H )ej]DXy
ACyK#5E
import org.rut.util.algorithm.SortUtil; wI@87&
@R&d<^I&M
/** 'AA9F$Dz
* @author treeroot atyvo0fNd
* @since 2006-2-2 4!dc/K
* @version 1.0 !!C/($
*/ 8}|et~7!
public class HeapSort implements SortUtil.Sort{ f~VlCdf+
}n^Rcz6HeO
/* (non-Javadoc) TIGtX]`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $d*9]M4
*/ 9q'&tU'a=c
public void sort(int[] data) { (=j;rfvP
MaxHeap h=new MaxHeap(); UWT%0t_T
h.init(data); o]1BWwtY&
for(int i=0;i h.remove(); a7g;8t-&
System.arraycopy(h.queue,1,data,0,data.length); $INB_/RE
} 9nR\7!_
<- \|>r Q
private static class MaxHeap{ ;wwc;wQ'
c!IZLaVAr9
void init(int[] data){ A-!e$yz>
this.queue=new int[data.length+1]; {s8c@-'
for(int i=0;i queue[++size]=data; w;lpJB\
fixUp(size); /h>g-zb
} ~nA k-toJ
} O},}-%G
ed6@o4D/kf
private int size=0; re*}a)iL
=Dn<DV
private int[] queue; !Se0&Ob
%#2$B+
public int get() { yCxYFi
return queue[1]; D0Q9A]bD;
} JLu$1A@ '
rqjq}L)
public void remove() { g<Z :`00|
SortUtil.swap(queue,1,size--); R/=rNUe
fixDown(1); 5m1J&TZ0
} OHndZ$'fI
file://fixdown 4\n ~
private void fixDown(int k) { >ai,6!
int j; |Y uf/G%/
while ((j = k << 1) <= size) { x?L[*N_ml
if (j < size %26amp;%26amp; queue[j] j++; FJ3S
if (queue[k]>queue[j]) file://不用交换 ;FqmZjm
break; O=jLZ2os
SortUtil.swap(queue,j,k); zM0}(5$m
k = j; h ;*x1BVE
} YYQvt
} @;egnXxF<
private void fixUp(int k) { =gj?!d`
while (k > 1) { ?oYO !
int j = k >> 1; IAO5li3
if (queue[j]>queue[k]) Wk[a|>
break; BgXZr,?
SortUtil.swap(queue,j,k); 6l\5J6x
k = j; AlQhKL}|s
} mG1~rI
} C~2!@<y
p]kEH\ sh
} @_do<'a
-lo?16w
} 9"P+K.%
M+%Xq0`T
SortUtil： 6 - 3?&+
E+\?ptw
package org.rut.util.algorithm; &'u|^d
it}h8:^<
import org.rut.util.algorithm.support.BubbleSort; <H^jbK
import org.rut.util.algorithm.support.HeapSort; |u>V> PN
import org.rut.util.algorithm.support.ImprovedMergeSort; v.]{b8RR
import org.rut.util.algorithm.support.ImprovedQuickSort; $5XAS
import org.rut.util.algorithm.support.InsertSort; Cfi4~&
import org.rut.util.algorithm.support.MergeSort; BdD]HXB|_
import org.rut.util.algorithm.support.QuickSort; vm@V5oH
import org.rut.util.algorithm.support.SelectionSort; ) ^En
import org.rut.util.algorithm.support.ShellSort; rD}g9?ut
T 6D+@i
/** boojq{cvYA
* @author treeroot 3H,x4L5j
* @since 2006-2-2 "AagTFs(i
* @version 1.0 c4AJ`f.5
*/ wa@Rlzij>
public class SortUtil { !Q>xVlPVu
public final static int INSERT = 1; { {\oC$
public final static int BUBBLE = 2; $UzSPhv[
public final static int SELECTION = 3; KPToyCyR1
public final static int SHELL = 4; A}lxJ5h0
public final static int QUICK = 5; %mQ&pk
public final static int IMPROVED_QUICK = 6; as@8L|i*
public final static int MERGE = 7; qxI$F
public final static int IMPROVED_MERGE = 8; ?-j/X6(\(
public final static int HEAP = 9; 3S3 a|_+%
+<Gp >c
public static void sort(int[] data) { MnD}i&k[
sort(data, IMPROVED_QUICK); 5'set?
} |&4A"2QN
private static String[] name={ 7L #)yY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" no+m.B
}; |Z>-<]p9g
N}5
private static Sort[] impl=new Sort[]{ d}O\:\}y
new InsertSort(), 2WS*c7Ct
new BubbleSort(), &h/r]KrZ
new SelectionSort(), {z>!Fw
new ShellSort(), `dm*vd
new QuickSort(), &>AwG4HW#j
new ImprovedQuickSort(), My>q%lF=fw
new MergeSort(), bpc1>?
new ImprovedMergeSort(), 8oE`>Y
new HeapSort() J!om"h
}; x{;{fMN1
5$ik|e^:y
public static String toString(int algorithm){ u4hn9**a1
return name[algorithm-1]; Mst%]@TG
} P7w RX F{
a6gw6jQ
public static void sort(int[] data, int algorithm) { N5K(yY_T
impl[algorithm-1].sort(data); -L/%2 X
} N)mZ!K44
` +YtTK
public static interface Sort { mP*$wE9b,:
public void sort(int[] data); Dspvc
} /rpr_Xw}
^1){ @(
public static void swap(int[] data, int i, int j) { 6 5zx<
int temp = data; hr]+4!/
data = data[j]; Vja 4WK*
data[j] = temp; Un8' P8C
} (EcP'F*;;y
} pT=^o