[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; 1oVDOo
} uC$4TnoQx.
int i1=l; {&AT}7
int i2=mid+1; XS~w_J#q
for(int cur=l;cur<=r;cur++){ 9$w)_RX9W
if(i1==mid+1) '1T v1
data[cur]=temp[i2++]; |Z)/
else if(i2>r) &T4Cn@
data[cur]=temp[i1++]; _\V{X}ftqa
else if(temp[i1] data[cur]=temp[i1++]; sT8kVN|Uv
else %Zi,nHg8
data[cur]=temp[i2++]; |D_n4#X7u
} OsuSx^}
} <PA$hTYM
pmXWI`s
} |r*1.V(
mwiPvwHrg
改进后的归并排序: !QzMeN;D
}t{^*(
package org.rut.util.algorithm.support; g&20F`.N*>
~#xs `@{s
import org.rut.util.algorithm.SortUtil; JL*]9$o
(6_/n&mF
/** u=N;P
* @author treeroot xuC6EK+
* @since 2006-2-2 G`<1>%"F
* @version 1.0 \>CBam8d
*/ L?5t<`#lw
public class ImprovedMergeSort implements SortUtil.Sort { rEyMSLN
Czl 8Q oH
private static final int THRESHOLD = 10; +/^q"/f F
&b:Zln.j
/* PzG:M7
* (non-Javadoc) @!tmUme1c
* 2/W0y!qh1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e&I.kC"j6
*/ R~u7;Wv
public void sort(int[] data) { D}=i tu
int[] temp=new int[data.length]; ry=[:\Z~
mergeSort(data,temp,0,data.length-1); }T(q"Vf~
} T%b^|="@
p~y 4q4
private void mergeSort(int[] data, int[] temp, int l, int r) { 6}ewBAq%
int i, j, k; /IR5[67
int mid = (l + r) / 2; ~wV98u-N
if (l == r) X>YOo~yS5
return; wH5O>4LO
if ((mid - l) >= THRESHOLD) x~I1(l7r
mergeSort(data, temp, l, mid); VY26Cf"
else HCCp<2D"C
insertSort(data, l, mid - l + 1); {twf7.eY
if ((r - mid) > THRESHOLD) S`PSFetC
mergeSort(data, temp, mid + 1, r); Nr7.BDA
else l`G:@}P>G
insertSort(data, mid + 1, r - mid); -x5bdC(d
;:YjgZ:+Q]
for (i = l; i <= mid; i++) { T{kwy3
temp = data; %Y[/Ucdm
} )bJ6{&
for (j = 1; j <= r - mid; j++) { c8 fb)`,k
temp[r - j + 1] = data[j + mid]; /60=N`i
} >~r@*gml
int a = temp[l]; ziip*<a!_
int b = temp[r]; AZP>\Dq
for (i = l, j = r, k = l; k <= r; k++) { x}24?mP
if (a < b) { um4zLsd#v
data[k] = temp[i++]; h*'5h!
a = temp; Q^;\!$:M
} else { / S^m!{
data[k] = temp[j--]; J*k=|+[
b = temp[j]; >I;#BE3
} u8\QhUk'G
} eJdQ7g[>
} X'p%$HsMG
[aUT #
/** T7X2$ '
* @param data u01^ABn
* @param l jYx(
* @param i 7q=xW6
*/ |#,W3Ik(l
private void insertSort(int[] data, int start, int len) { 66;O3g'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M& L0n%,y5
} MH(g<4>*
} '\qr=0aW
} FX%E7H
} :jCaDhK
JG$J,!.\
堆排序： vIv3rN=5vB
rI$10R$+H
package org.rut.util.algorithm.support; /v<8x?=
2,`mNjHh
import org.rut.util.algorithm.SortUtil; `2+52q<FO
f2XD^:Gc
/** e;\c=J,eE
* @author treeroot a_j#l(] 9
* @since 2006-2-2 p =O1aM
* @version 1.0 NX/)Z&Fx:
*/ }e|]G,NZO
public class HeapSort implements SortUtil.Sort{ `&DiM@Sm
;f*xOdi*k
/* (non-Javadoc) ~|]\.^B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) At:C4>HE@
*/ x=+H@YO\
public void sort(int[] data) { !9Ni[8&Fg0
MaxHeap h=new MaxHeap(); @1X1E 2:
h.init(data); [#H8Mb+7
for(int i=0;i h.remove(); D]y.!D{l2
System.arraycopy(h.queue,1,data,0,data.length); 9a,CiH%@
} VUhu"h@w%
AX?6Q4Gq1
private static class MaxHeap{ oDK\v8w-
7qp|Msf},
void init(int[] data){ )f|6=x4
this.queue=new int[data.length+1]; < ,n4|z)
for(int i=0;i queue[++size]=data; WVFy ZpB
fixUp(size); }7^*%$
} jR:Fih-}
} ~<-h# B
SJe;T
private int size=0; Nzt1JHRS
SesO$=y
private int[] queue; J>&GP#7}
4(]('[M
public int get() { HX^ P9jXT
return queue[1]; =25"qJr
} )Qp?LECrt
"[,XS`
public void remove() { rZ7 Ihof
SortUtil.swap(queue,1,size--); %&NK|M+n
fixDown(1); ^hJ,1{o
} efm<bJB2
file://fixdown 0cVXUTJ|W
private void fixDown(int k) { K>~l6
int j; S6I8zk)Z4
while ((j = k << 1) <= size) { >^}z
if (j < size %26amp;%26amp; queue[j] j++; ~{{:-XkVB
if (queue[k]>queue[j]) file://不用交换 oyY,uB.|
break; cgAcAcmY
SortUtil.swap(queue,j,k); ~CscctD{;
k = j; ?U[AE -*
} W@Wh@eSb;
} j/\XeG>
private void fixUp(int k) { =<icHt6s
while (k > 1) { xR3A4m
int j = k >> 1; "a7d`l:
if (queue[j]>queue[k]) :7zI!edu
break; ^}#!?"Y
SortUtil.swap(queue,j,k); KYaf7qy]
k = j; D=$<Ex^p
} ml2HA4X&$Y
} 8V=o%[t
D\JYa@*?.h
} Uyh#g^r
VdgPb (
} 7BnP,Nd"W
{DR+sE
SortUtil： 3lqhjA
X"sN~Q.0
package org.rut.util.algorithm; TM;)[R@
WfVie6
import org.rut.util.algorithm.support.BubbleSort; Z^3Risi
import org.rut.util.algorithm.support.HeapSort; [z9i v~
import org.rut.util.algorithm.support.ImprovedMergeSort; -1:asM7
import org.rut.util.algorithm.support.ImprovedQuickSort; W\ckt]'
import org.rut.util.algorithm.support.InsertSort; /r6DPR0\
import org.rut.util.algorithm.support.MergeSort; D.~t#a A
import org.rut.util.algorithm.support.QuickSort; *W l{2&
import org.rut.util.algorithm.support.SelectionSort; Pa*yo:U'h
import org.rut.util.algorithm.support.ShellSort; `y(3:##p
n1|%xQBU@
/** kW9STN
* @author treeroot bYfcn]N
* @since 2006-2-2 B(5g&+{Lq~
* @version 1.0 h2nyP
*/ |qD<h
public class SortUtil { Q\Eq(2p
public final static int INSERT = 1; @{G(.S
public final static int BUBBLE = 2; l;ugrAo?
public final static int SELECTION = 3; !ibp/:x
public final static int SHELL = 4; e;$s{CNo
public final static int QUICK = 5; xnTky1zq
public final static int IMPROVED_QUICK = 6; N Jf''e3
public final static int MERGE = 7; 7pNh|#Uv'
public final static int IMPROVED_MERGE = 8; h7{W-AtM7_
public final static int HEAP = 9; G[mYx[BTz
6=FuH@Q&
public static void sort(int[] data) { ME.LS2'n
sort(data, IMPROVED_QUICK); }z[se)s
} Ic*Q(X
private static String[] name={ u|C9[(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f]EHDcC3X
}; sQkP@Y
*,(`%b[
private static Sort[] impl=new Sort[]{ NNT9\JRv_
new InsertSort(), C^a~)r.h
new BubbleSort(), l6~eb=u;9g
new SelectionSort(), &1&*(oi]X
new ShellSort(), 8{RiaF8
new QuickSort(), b#F3,T__`Y
new ImprovedQuickSort(), >HDK<1>
new MergeSort(), ?s//a_nL*
new ImprovedMergeSort(), )`)cB)s
new HeapSort() ZO,]h9?4
}; t9kgACo/M
L\UYt\ks
public static String toString(int algorithm){ $I'ES#8P6
return name[algorithm-1]; lxeolDl
} t?s1@}G^
A[oRi}=
public static void sort(int[] data, int algorithm) { n1QO/1} :
impl[algorithm-1].sort(data); `7LdF,OdE
} C-(&zwj?!
b(yY.L=K
public static interface Sort { ("{'],>
public void sort(int[] data); *(rq AB0~
} SF6n06UZu
z)ydQw>
public static void swap(int[] data, int i, int j) { ms?h/*E<H
int temp = data; J-U}iU|
data = data[j]; Vrnx#j-U
data[j] = temp; (efH>oY[
} TCVJ[LbJ
} |Bjb