[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; }I uqB*g[t
} &G_#=t&
int i1=l; `PAQv+EYz
int i2=mid+1; z<9C-
for(int cur=l;cur<=r;cur++){ !y XGAg,
if(i1==mid+1) Z:^#9D{
data[cur]=temp[i2++]; h=`$ec
else if(i2>r) XcT!4xG0
data[cur]=temp[i1++]; V/H+9+B7Im
else if(temp[i1] data[cur]=temp[i1++]; "9'3mmZm=?
else XgX~K:<jt
data[cur]=temp[i2++]; ?WXftzdf6u
} :z P:4NW
} vrb@::sy0T
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} v3cMPN
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改进后的归并排序: hNh!H<}|m8
G@Z%[YNw
package org.rut.util.algorithm.support; AP%R*0]
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import org.rut.util.algorithm.SortUtil; mvH8hvD9
=&08s(A
/** >ye.rRZd`
* @author treeroot d6*84'|!
* @since 2006-2-2 ?7wcv$K5
* @version 1.0 \&+Y;:6
*/ !HU$V9C
public class ImprovedMergeSort implements SortUtil.Sort { eik_w(xPT
s9"X.-!
private static final int THRESHOLD = 10; 'gor*-o:wu
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/* oS$7k3s fj
* (non-Javadoc) 0,~s0]h0V
* s"#N;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D~ 3@v+d
*/ v`QDms,{
public void sort(int[] data) { ;b65s9n^b
int[] temp=new int[data.length]; @~s5{4
mergeSort(data,temp,0,data.length-1); nG3SDL#(k
} c-JXWNz
sXEIC#rq
private void mergeSort(int[] data, int[] temp, int l, int r) { i[9gcL"
int i, j, k; m%u`#67oK
int mid = (l + r) / 2; ?bM%#x{e
if (l == r) +o4o!;E)
return; ,w6?Ap
if ((mid - l) >= THRESHOLD) _4) t
mergeSort(data, temp, l, mid); \^,Jh|T
else .S|T{DMQ[
insertSort(data, l, mid - l + 1); $+J39%Y!^
if ((r - mid) > THRESHOLD) kwUUvF7w
mergeSort(data, temp, mid + 1, r); Z<>gx m<
else vkJyD/;=
insertSort(data, mid + 1, r - mid); *LhwIY
k-3;3Mq
for (i = l; i <= mid; i++) { *:d``L
temp = data; USEmD5q
} XdDQ$'*X
for (j = 1; j <= r - mid; j++) { n:40T1:q
temp[r - j + 1] = data[j + mid]; l=9D!64
} ){P`-ZF
int a = temp[l]; Trh t2Iv
int b = temp[r]; 1J1Jp|j.
for (i = l, j = r, k = l; k <= r; k++) { P=EZ6<c3&
if (a < b) { R5QW4i9
data[k] = temp[i++]; 2m*ugBO;
a = temp; T_2'=7
} else { !QAndg{;D
data[k] = temp[j--]; eD7\,}O
b = temp[j]; u,iiS4'Ze
} i#YDdz
} "k+ :!D
} /Z*$k{qIR&
pW8?EGO@
/** W20- oZ8
* @param data Ay6T*Nu`
* @param l 0y<9JvN$9
* @param i =.S2gO >
*/ hoBFC1
private void insertSort(int[] data, int start, int len) { .T8^>z1/\F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3F;0a ;[
} @>U9CL"
} *g}==o`
} 74 ptd,
} } %0w25
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堆排序： _3wJ;cn.
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package org.rut.util.algorithm.support; ?~.9:93
n5xG4.#G
import org.rut.util.algorithm.SortUtil; @Z$fEG)9
?xKiN5q"6
/** ;;UsHhbhI
* @author treeroot C`Vuw|Xl
* @since 2006-2-2 1*9Yy~w
* @version 1.0 sR PQr?
*/ S|u5RU8*"|
public class HeapSort implements SortUtil.Sort{ +>ituJ
:W&klUU"
/* (non-Javadoc) NY?iuWa*g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fU.hb%m)Q\
*/ A|IPQ=
public void sort(int[] data) { D.AiqO<z
MaxHeap h=new MaxHeap(); oIE(`l0l
h.init(data); uq:'`o-1
for(int i=0;i h.remove(); uJ=&++[
System.arraycopy(h.queue,1,data,0,data.length); >oy%qLHe~t
} )I<VH+6
|'i ?o
private static class MaxHeap{ <5]_u:
|OF3J,q
void init(int[] data){ (ce)A,;
this.queue=new int[data.length+1]; zXGI{P0O
for(int i=0;i queue[++size]=data; G@ybx[_[@
fixUp(size); 3S^Qo9S
} YA8/TFu<_
} BI#(L={5
S#+ _HFUK{
private int size=0; _jkJw2+s\
2s 9U&
private int[] queue; /%?bO-
ioTqT:.
public int get() { %iV\nFal>
return queue[1]; &U.y):
} F r2 +p
Z+J~moW `
public void remove() { 3joMtRB>;
SortUtil.swap(queue,1,size--); QIN# \
fixDown(1); <N80MUL|
} #2.C$
file://fixdown N/^[c+J[E
private void fixDown(int k) { YRl4?}r2
int j; R<h0RKiM@
while ((j = k << 1) <= size) { Z.>?Dt
if (j < size %26amp;%26amp; queue[j] j++; . 55aY~We
if (queue[k]>queue[j]) file://不用交换 _x#r,1V+D
break; yCg>]6B
SortUtil.swap(queue,j,k); 0XIrEwm@%
k = j; /s:akLBaD
} |("5 :m
} SLd9-N}T
private void fixUp(int k) { @qJv
while (k > 1) { >W8PLo+i
int j = k >> 1; +fIyeX
if (queue[j]>queue[k]) 6B?1d /8V
break; 93`
SortUtil.swap(queue,j,k); FUPJ&7+B
k = j; YX2j;Y?
} Z3T26Uk
} }Ty_} 6a5
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} 0Zl1(;hx@
h"nv[0!)
} zwHTtE
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SortUtil： GHWpL\A{8`
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package org.rut.util.algorithm; ]zK} X!
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import org.rut.util.algorithm.support.BubbleSort; }@A~a`9g
import org.rut.util.algorithm.support.HeapSort; X4*/h$48 w
import org.rut.util.algorithm.support.ImprovedMergeSort; 8%U)EU
import org.rut.util.algorithm.support.ImprovedQuickSort; 8c$IsvJg
import org.rut.util.algorithm.support.InsertSort; /L[:C=u
import org.rut.util.algorithm.support.MergeSort; WI'csM;M#
import org.rut.util.algorithm.support.QuickSort; ln!KL'T]
import org.rut.util.algorithm.support.SelectionSort; {k~$\J?.
import org.rut.util.algorithm.support.ShellSort; a. 5`Q2
kp;MNRc
/** ~GY;{
* @author treeroot +V\NMW4d
* @since 2006-2-2 E3KPJ`=!*"
* @version 1.0 n#]G!7
*/ pK1(AV'L
public class SortUtil { j({L6</x
public final static int INSERT = 1; ]g+(#x_.?
public final static int BUBBLE = 2; L_Ai/'
public final static int SELECTION = 3; gf@'d.W}
public final static int SHELL = 4; %F/tbXy{
public final static int QUICK = 5; )d1,}o
public final static int IMPROVED_QUICK = 6; O "h+i>|l
public final static int MERGE = 7; ;NPb
public final static int IMPROVED_MERGE = 8; Y2D)$
public final static int HEAP = 9; bFx?HM.AGW
1Q;`<=
public static void sort(int[] data) { =XS'V*
sort(data, IMPROVED_QUICK); da^9Fb
} `") I[h
private static String[] name={ mg;AcAS.o,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )*JTxMQ
}; 0UB'6wRVo
D 7E^;W)H
private static Sort[] impl=new Sort[]{ F^~#D, \
new InsertSort(), ^ pR&
new BubbleSort(), 1-[{4{R
new SelectionSort(), |O+binq
new ShellSort(), 4'8.f5
new QuickSort(), e O}mZN
new ImprovedQuickSort(), +[7u>RJ
new MergeSort(), ~5#7i_%@E}
new ImprovedMergeSort(), *ZEs5`x
new HeapSort() WL~`L!_. A
}; O&0R ~<n
VEZ/-s/
public static String toString(int algorithm){ v>P){VT
return name[algorithm-1]; }R'oAE}$
} u60l-
/][U$Q;Ke
public static void sort(int[] data, int algorithm) { cK } Qu
impl[algorithm-1].sort(data); 0nuFWV
} A|+{x4s`
']NM_0
public static interface Sort { i xyjl[G
public void sort(int[] data); &Gt9a-ne
} 8|/YxF<
_B[(/wY
public static void swap(int[] data, int i, int j) { eyWwE%
int temp = data; \#}%E h b
data = data[j]; BMW4E 5
data[j] = temp; KKzvoc?Bt
} q.t5L=l^ r
} 3N21[i2/m