[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; %%w/;o!c
} /W,K% s]
int i1=l; *Ugtg9j
int i2=mid+1; RRBokj)]
for(int cur=l;cur<=r;cur++){ ZxwI< T:&
if(i1==mid+1) egYJ.ZzF0
data[cur]=temp[i2++]; t1 OnA#]/_
else if(i2>r) aHXd1\6m
data[cur]=temp[i1++]; =CFO]9
else if(temp[i1] data[cur]=temp[i1++]; KaauX m
else }(hx$G^M
data[cur]=temp[i2++]; bvUjH5.7
} ?N~rms e
} 2LiJ IO8N
pyq~_Bng
} l <Tkg9
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改进后的归并排序: w+fsw@dK&
p[!&D}&6h
package org.rut.util.algorithm.support; D2#3fM6
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import org.rut.util.algorithm.SortUtil; LS}u6\(
"@xI
/** 7YV}F9h4
* @author treeroot c/jU+,_g
* @since 2006-2-2 pi*cO
* @version 1.0 etMQy6E\
*/ /vYuwaWG=
public class ImprovedMergeSort implements SortUtil.Sort { bE74Ui
*?zmo@-
private static final int THRESHOLD = 10; w<!F& kQB
D|9xD
/* _/;vsQB
* (non-Javadoc) _ho9}7 >
* $nUhM|It
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -y|>#`T/
*/ g`i?]6c}jt
public void sort(int[] data) { mSm:>hBd
int[] temp=new int[data.length]; T`mG+"O
mergeSort(data,temp,0,data.length-1); j^;f {0f
} w[YiH $
K|%.mcs4
private void mergeSort(int[] data, int[] temp, int l, int r) { `|)V]<
int i, j, k; lD)ZMaaS3
int mid = (l + r) / 2; "Rr)1x7
if (l == r) RL4J{4K
return; >o9tlO)
if ((mid - l) >= THRESHOLD) X [IVK~D}z
mergeSort(data, temp, l, mid); &OQ37(<_
else d0``:
insertSort(data, l, mid - l + 1); # 2;6!_
if ((r - mid) > THRESHOLD) f8E,.$>
mergeSort(data, temp, mid + 1, r); c|RTP
else QiC}hj$
insertSort(data, mid + 1, r - mid); OIJNOuI
pse$S=
for (i = l; i <= mid; i++) { S9RH&/^H
temp = data; Y\75cfD
} 'tvX.aX2
for (j = 1; j <= r - mid; j++) { o]/*YaB2>
temp[r - j + 1] = data[j + mid]; .3>`yL
} Yw=7(}
int a = temp[l]; m&vuBb3
int b = temp[r]; qJ(XW N H
for (i = l, j = r, k = l; k <= r; k++) { =Ot|d #_
if (a < b) { ^G(U@-0..
data[k] = temp[i++]; =sZ58xA
a = temp; 8k +^jj
} else { M`V<`
data[k] = temp[j--]; _4,/uG|a O
b = temp[j]; (;VlK#rnC
} #1fL2nlP*E
} {,aX|*1Ku~
} fk&>2[^&
8ShIn@|32
/** q7z`oK5
* @param data !E7JDk''@
* @param l aAKwC01?
* @param i /_SQKpic
*/ Upw`|$1S
private void insertSort(int[] data, int start, int len) { QL]e<2oPJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (^pIB~.z
} V82HO{ D
} &cGa~#-u
} Znw3P|>B
} 3 C{A
g+Z~"O]$M
堆排序： Yoy}Zdu}h
4%do.D*
package org.rut.util.algorithm.support; R(Y4nw+Y-
C.M]~"e
import org.rut.util.algorithm.SortUtil; >q0c!,Ay
bd],fNgJ
/** M$j]VZ
* @author treeroot hawE2k0p(
* @since 2006-2-2 '(M8D5?N-
* @version 1.0 XKqUbi
*/ _U<sz{6
public class HeapSort implements SortUtil.Sort{ 0KknsP7
^DZ(T+q,
/* (non-Javadoc) "NqB_?DT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }{<@wE%s
*/ Dg](?^
public void sort(int[] data) { ghq#-N/t
MaxHeap h=new MaxHeap(); Y'6GY*dL
h.init(data); <{U "0jY!9
for(int i=0;i h.remove(); 48 DC
System.arraycopy(h.queue,1,data,0,data.length); 5N=QS1<$5
} B=K&+
$7%e|0jC
private static class MaxHeap{ Dk&@AjJga
+/,J$(
void init(int[] data){ iYE:o{
this.queue=new int[data.length+1]; JGjqBuz#A*
for(int i=0;i queue[++size]=data; 0_7A <
fixUp(size); fv?vO2nj
} <0!/7*;#ZT
} 6`$HBX%.K
-A}U^-'a}
private int size=0; 8RC7Ei
OmO/x
private int[] queue; I8=p_Ie
83io@*D
public int get() { go^?F- dZ
return queue[1]; ^^MVd@,i
} O=c^Ak
~Dsz9 f
public void remove() { gc|?$aE
SortUtil.swap(queue,1,size--); "p<B|
fixDown(1); %hcn|-"F
} iXl6XwWT%8
file://fixdown G:TM k4
private void fixDown(int k) { :_R[@?c
int j; u_+64c_7
while ((j = k << 1) <= size) { pJ*x[y
if (j < size %26amp;%26amp; queue[j] j++; y8/ 7@qw
if (queue[k]>queue[j]) file://不用交换 ^_dYE]t
break; ":t'}Eg=6
SortUtil.swap(queue,j,k); zqqu7.`
k = j; \-A=??@H
} b65V*Vbj
} F2QX ^*
private void fixUp(int k) { i}C9
while (k > 1) { l#!p?l
int j = k >> 1; >^vyp!
if (queue[j]>queue[k]) 6|q\ M
break; .<Y7,9;YEF
SortUtil.swap(queue,j,k); Y/\y"a
k = j; 2, bo
} R2uekpP
} SyHS9>
<3aiS?i.h
} j. 1@{H
e!_+TyI
} \4;}S&`k
fJ \bm
SortUtil： :__z?<?(
{9(#X]'
package org.rut.util.algorithm; ySyA!Z
Hggp*(AQK
import org.rut.util.algorithm.support.BubbleSort; <PCa37
import org.rut.util.algorithm.support.HeapSort; +6cOL48"
import org.rut.util.algorithm.support.ImprovedMergeSort; 3@'3U?Hin
import org.rut.util.algorithm.support.ImprovedQuickSort; !JZ)6mtlr
import org.rut.util.algorithm.support.InsertSort; 4.?tP7UE
import org.rut.util.algorithm.support.MergeSort; I$Z8]&m
import org.rut.util.algorithm.support.QuickSort; E1p?v!
import org.rut.util.algorithm.support.SelectionSort; \F_~?$
import org.rut.util.algorithm.support.ShellSort; eBw6k09C+
~`7L\'fs
/** OMaG*fb=
* @author treeroot :el]IH
* @since 2006-2-2 N@Ie VF
* @version 1.0 g=8}G$su{%
*/ Yv="oG!xL
public class SortUtil { ``l7|b jJ
public final static int INSERT = 1; AQCU\E
public final static int BUBBLE = 2; xx^7
public final static int SELECTION = 3; _0Mt*]L }
public final static int SHELL = 4; 'q+CL&D
public final static int QUICK = 5; XYeuYLut
public final static int IMPROVED_QUICK = 6; <+0TN]?
public final static int MERGE = 7; y _Mte
public final static int IMPROVED_MERGE = 8; :C%cnU;N
public final static int HEAP = 9; N{6 -rR
^cQTRO|
public static void sort(int[] data) { "qb1jv#to
sort(data, IMPROVED_QUICK); =&kd|o/i
} b:OQ/
private static String[] name={ ;QVX'?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ryk(Am<
}; $j ZU(<4,
RgF5w<Vd.
private static Sort[] impl=new Sort[]{ Vn4y^_H
new InsertSort(), =D1%-ym
new BubbleSort(), y$JM=f$
new SelectionSort(), (]wd8M
new ShellSort(), "YUh4uZ~P
new QuickSort(), 6Dx^$=Sa$
new ImprovedQuickSort(), v61'fQ1Qg!
new MergeSort(), fu}ZOPu
new ImprovedMergeSort(), +:JyXFu
new HeapSort() _]g?3Gw7!
}; ]!v:xjzT
^#^\@jLm
public static String toString(int algorithm){ jJ(()EJ
return name[algorithm-1]; 8efQ-^b.
} @qszwQav$
_trF/U<
public static void sort(int[] data, int algorithm) { rKK{*%n
impl[algorithm-1].sort(data); `V(zz
} n"p|tEK
=TTk5(m
public static interface Sort { m2j&v$
public void sort(int[] data); h3}gg@Fm
} %Ls5:Z=
{ S]"-x
public static void swap(int[] data, int i, int j) { -F7GUB6B
int temp = data; ]HpKDb0+
data = data[j]; ~M>EB6
data[j] = temp; PNjZbOmzS
} {C%#r@6
} 9>@@W#TK~