[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; \MmKz^tO
} x*F_XE1#M
int i1=l; xgB-m[Xi
int i2=mid+1; DYL\=ya1
for(int cur=l;cur<=r;cur++){ A)o%\j
if(i1==mid+1) xo(3<1mD
data[cur]=temp[i2++]; Ns`:=
else if(i2>r) e&XJK*Wf
data[cur]=temp[i1++]; JuXuS
else if(temp[i1] data[cur]=temp[i1++]; k|_LF[*Z
else n'Z5rXg
data[cur]=temp[i2++]; I~U;M+n*y
} VxGR[kq$]
} 5!^?H"#c
a/p /<
} Zk 9i}H
YH$whJ`W0
改进后的归并排序: ndB*^nT
5B+I\f&
package org.rut.util.algorithm.support; i@spd5.
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import org.rut.util.algorithm.SortUtil; ao)8ie
X0gWTs
/** HpTX6}^
* @author treeroot nM&UdKf3
* @since 2006-2-2 %(n^reuP
* @version 1.0 8AVG pL
*/ m^ [VM&%
public class ImprovedMergeSort implements SortUtil.Sort { u}IQ)Ma
BpZ17"\z
private static final int THRESHOLD = 10; !mRDzr7
a$P$Ngi?S
/* %W]"JwRu
* (non-Javadoc) >qjV(_?F-
* `z!?!"=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _i+7O^=d6X
*/ qx\P(dOUf
public void sort(int[] data) { ;tu2}1#r
int[] temp=new int[data.length]; ?>o|H-R~5Z
mergeSort(data,temp,0,data.length-1); tR% &.,2
} i$W=5B>SO
>4eZ%</D5
private void mergeSort(int[] data, int[] temp, int l, int r) { H?<ceK'e
int i, j, k; {oc7Chv=/H
int mid = (l + r) / 2; 23=SXA!
if (l == r) ZpQ8KY$5
return; 04cNi~@m
if ((mid - l) >= THRESHOLD) r:uW(<EP^
mergeSort(data, temp, l, mid); Di8;Tq
else \mp5G&+/Q
insertSort(data, l, mid - l + 1); [xsiSt?6
if ((r - mid) > THRESHOLD) eMV@er|
mergeSort(data, temp, mid + 1, r); 8|iMD1
else \H5{[ZUn
insertSort(data, mid + 1, r - mid); p?zh4:\F+
C1KO]e>
for (i = l; i <= mid; i++) { uA2-&smw
temp = data; f$^+;j
} [?Ub =sp
for (j = 1; j <= r - mid; j++) { j>t*k!db
temp[r - j + 1] = data[j + mid]; n32.W?9
} esVZ2_eL
int a = temp[l]; 3teanU`
int b = temp[r]; !u=,bfyH
for (i = l, j = r, k = l; k <= r; k++) { N`%f+eT(
if (a < b) { ]w[T_4l
data[k] = temp[i++]; [e+$jsPl
a = temp; Pb-Ft=
} else { v<U +&D{
data[k] = temp[j--]; Jf=$h20x
b = temp[j]; CuD^@
} SQd`xbIuL
} HfgK0wIi
} Tx'ctd#Y
Z6vm!#\
/** @|GKNW#
* @param data d~b#dcv$"
* @param l vAMr&[
* @param i jL[ hB
*/ J6Q}a7I#
private void insertSort(int[] data, int start, int len) { T{%'"mm;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d(-$ { c
} |6.1uRFE2
} :'LG%E:b
} E@F:U*A6%
} xz$S5tgDQK
c_r&)8
堆排序： I^z$0
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package org.rut.util.algorithm.support; 0fTEb%z8
dnP3{!"b
import org.rut.util.algorithm.SortUtil; X519} l3
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/** g6. =(je
* @author treeroot \!tS|h
* @since 2006-2-2 Lx"a#rZ
* @version 1.0 $ (gR^L
*/ @GiR~bKZ
public class HeapSort implements SortUtil.Sort{ D< 4!7*9%
nBVknyMFNF
/* (non-Javadoc) !7K-Kqn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xf.2Ig
*/ >xt*(j&}
public void sort(int[] data) { MXxE)"G*a
MaxHeap h=new MaxHeap(); r2*'5jk_
h.init(data); Pyx$$cj
for(int i=0;i h.remove(); /B?hM&@z
System.arraycopy(h.queue,1,data,0,data.length); 6/#5TdJA
} mJ%r2$/*
]3E':JM@
private static class MaxHeap{ ;#$zHR
H?=D,
void init(int[] data){ -~HlME*~f
this.queue=new int[data.length+1]; [[[QBplJ
for(int i=0;i queue[++size]=data; {:3XP<hqN
fixUp(size); `f2m5qTP%
} ;')T}wuq
} 0CD2o\`8
G"BoD5m
private int size=0; ):_x
d%istFL)
private int[] queue; zq5_&AeW
)^&)f!f
public int get() { LQMVC^G
return queue[1]; W`PK9juu
} "Jp6EL%
2Z-BZuK6p
public void remove() { N!fp;jvG
SortUtil.swap(queue,1,size--); TLL.Ch|#Y
fixDown(1); A*h)p@3t<
} 3\,TI`^C
file://fixdown Xm`K@hJ@
private void fixDown(int k) { 7<=7RPWmD
int j; i#jCf3%+ h
while ((j = k << 1) <= size) { ^saJfr x
if (j < size %26amp;%26amp; queue[j] j++; m,u? ^W
if (queue[k]>queue[j]) file://不用交换 >oc7=F<8lS
break; r[$Qtj Q
SortUtil.swap(queue,j,k); FVsNOU
k = j; z^4\?R50yO
} _W: S>ij(
} TBQ`:`g^m
private void fixUp(int k) { F|V co]"S1
while (k > 1) { YV 9*B
int j = k >> 1; )N-+,Ms
if (queue[j]>queue[k]) q\[31$i$
break; w9}I*Nra
SortUtil.swap(queue,j,k); IEzZ$9,A5
k = j; <MN+2^ed&
} e<^tY0rR&
} 0nAeeVz|
Iw"?%k\U
} }}qR~.[
8IC((
} nm'm*sU\
r/Pg,si
SortUtil： +V|]:{3W
/$rS0@p
package org.rut.util.algorithm; nWZrB s _
YKh%`Y1<
import org.rut.util.algorithm.support.BubbleSort; ?NI)3-l
import org.rut.util.algorithm.support.HeapSort; %!rsu-W:Y
import org.rut.util.algorithm.support.ImprovedMergeSort; Yb =8\<;
import org.rut.util.algorithm.support.ImprovedQuickSort; CSU>nIE0
import org.rut.util.algorithm.support.InsertSort; $zCUQthL@
import org.rut.util.algorithm.support.MergeSort; $)@zlnU
import org.rut.util.algorithm.support.QuickSort; HIhoYSwB
import org.rut.util.algorithm.support.SelectionSort; >[xQUf,p
import org.rut.util.algorithm.support.ShellSort; i6m;2 UAa
U(./LrM05
/** kX1hcAa
* @author treeroot zMrZ[AU
* @since 2006-2-2 Zt` ,DM
* @version 1.0 xs &vgel>
*/ ,75,~
public class SortUtil { l!iB -?'u
public final static int INSERT = 1; Mdwh-Cis/
public final static int BUBBLE = 2; y+:<
public final static int SELECTION = 3; cDTDim1F
public final static int SHELL = 4; 9I RE@c
public final static int QUICK = 5; #8/Z)-G
public final static int IMPROVED_QUICK = 6; dy`~%lX?
public final static int MERGE = 7; 1xtbhk]D
public final static int IMPROVED_MERGE = 8; Q|G[9HBI
public final static int HEAP = 9; '`o+#\,b^%
m@c2'*&Y
public static void sort(int[] data) { w-nkf M~
sort(data, IMPROVED_QUICK); 5WZLB =
} 103Ik6.o
private static String[] name={ _X.M,id
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ar'5kPzY>
}; I3s}t$`y(
:,VyOmf
private static Sort[] impl=new Sort[]{ K->p&6s
new InsertSort(), hcaH
new BubbleSort(), %)aDh }
new SelectionSort(), 7SqsVq`[~
new ShellSort(), +vbNZqwz
new QuickSort(), 4t8 Hy
new ImprovedQuickSort(), Vfw$>og!
new MergeSort(), <g%xo"
new ImprovedMergeSort(), ;%82Z4
new HeapSort() d#z67Nl6
}; "{0kg'fU
3S5QqAm
public static String toString(int algorithm){ /r?X33D!
return name[algorithm-1]; 0^[$0]Mt[
} fg1 zT~
=q"3a9pb7
public static void sort(int[] data, int algorithm) { Ahebr{u
impl[algorithm-1].sort(data); X>wQYIi
} nEn2!)$
c&_3"2:
public static interface Sort { gh 0\9;h
public void sort(int[] data); /V*eAn8>
} tIvtiN6[|l
V?rI,'F>N
public static void swap(int[] data, int i, int j) { ]JM9 ^F
int temp = data; HxM-VK'
data = data[j]; !{3pp
data[j] = temp; )t.q[O`
} >ab=LDoM
} :D/R