[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; '%X29B5
} >4#:qIU
int i1=l; #w3J+U 6r
int i2=mid+1; '}^qz#w
for(int cur=l;cur<=r;cur++){ }Y^o("c(
if(i1==mid+1) Q=61.lP6
data[cur]=temp[i2++]; 5sANF9o!
else if(i2>r) OqWm5(u&S
data[cur]=temp[i1++]; ppo0DC\>
else if(temp[i1] data[cur]=temp[i1++]; jddhX]>I
else q3vv^~
data[cur]=temp[i2++]; G6.lRaPu"m
} qSGM6kb
} *c\XQy
?fN6_x2e3
} 5 JlgnxRq
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改进后的归并排序: k`;d_eW
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package org.rut.util.algorithm.support; +_L]d6
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import org.rut.util.algorithm.SortUtil; '4Jf[
#mU<]O
/** &b`'RZe
* @author treeroot gnGh )
* @since 2006-2-2 !Rc %
* @version 1.0 cQ]c!G|a4
*/ Wco2i m
public class ImprovedMergeSort implements SortUtil.Sort { *MS$C$HOq
r.'xqzF/
private static final int THRESHOLD = 10; sv!zY= 6
n5%\FFG0M
/* $KQ q~|
* (non-Javadoc) ] s^7c
* v6|j.;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Q62I\
*/ Dw/vXyZ
public void sort(int[] data) { gD51N()s,
int[] temp=new int[data.length]; R[14scV
mergeSort(data,temp,0,data.length-1); H~TuQ
} <S=(`D
ZH|q#<{l
private void mergeSort(int[] data, int[] temp, int l, int r) { oNIYO*[
int i, j, k; < =~=IZ)
int mid = (l + r) / 2; c~4Cpy^
if (l == r) ZY8w1:'
return; &l0K~7)b
if ((mid - l) >= THRESHOLD) _|4R^*/4
mergeSort(data, temp, l, mid); /@|iI<|
else nw\C+1F
insertSort(data, l, mid - l + 1); }AA">FF'y4
if ((r - mid) > THRESHOLD) %*szB$[3
mergeSort(data, temp, mid + 1, r); L}CU"
else 8{=|<
insertSort(data, mid + 1, r - mid); OPzudO
Q=8YAiCu
for (i = l; i <= mid; i++) { bf@g*~h@
temp = data; 78{9@\e"0
} 4BUG\~eI3
for (j = 1; j <= r - mid; j++) { ?Wz2J3A.2t
temp[r - j + 1] = data[j + mid]; v$0|\)E)
} 8^^ 1h
int a = temp[l]; !(7m/R
int b = temp[r]; kc0MQ TJU
for (i = l, j = r, k = l; k <= r; k++) { Pn^`_
if (a < b) { sQ340!
data[k] = temp[i++]; pbEWnx_
a = temp; g<(!>:h
} else { 0VcHz$ 6
data[k] = temp[j--]; "b~C/-W I
b = temp[j]; umWs8-'Uw
} "T_9_6tH
} a7c`[
} /='0W3+o*L
U+*l!"O,
/** VsJ+-IHm
* @param data 1Xo0(*O
* @param l (D%vN&F
* @param i kmc_%Wm}
*/ ~h_ _Y>
private void insertSort(int[] data, int start, int len) { u.|%@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \wD/TLS}
} CV\^gTPmx
} EYn?YiVFU
} w$/lq~zU
} h$kz3r;b,"
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堆排序： o S=!6h
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package org.rut.util.algorithm.support; o_`6oC"s
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import org.rut.util.algorithm.SortUtil; 6FNGyvBU
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/** @]%eL
* @author treeroot triU^uvh
* @since 2006-2-2 u&#>)h
* @version 1.0 pDZewb&cA
*/ u+Ix''Fn#%
public class HeapSort implements SortUtil.Sort{ dkz% Y]
uUg;v/:
/* (non-Javadoc) IK\~0L;ozE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =X?fA,
*/ U!o7Nw@z
public void sort(int[] data) { ;.Bz'Q
MaxHeap h=new MaxHeap(); ns%gb!FBJX
h.init(data); :-}K:ucaj
for(int i=0;i h.remove(); pe vXixl
System.arraycopy(h.queue,1,data,0,data.length); {o5|(^l
} k7Bh[ ..!
)`rD]0ua;
private static class MaxHeap{ I4G0!"T+
LWv<mtuYf
void init(int[] data){ b'\Q/;oz>
this.queue=new int[data.length+1]; Q3tyK{JE
for(int i=0;i queue[++size]=data; y<kUGsD
fixUp(size); &'$Bk5D@G
} $uHQl#!;
} LAlwQ^v|
{/]2~!
private int size=0; R|8vdZ%@
6&os`!
private int[] queue; {lWVH
m;~}}~&vQ
public int get() { GMJ4v S
return queue[1]; 0TmEa59P
} $KbZ4bB[Bo
4`Ud\Jm[s
public void remove() { ?OFa Q
SortUtil.swap(queue,1,size--); VKl,m ;&N
fixDown(1); 6 X~><r
} ).;{'8Q
file://fixdown i"}z9Ae~.
private void fixDown(int k) { n7fhc*}:`
int j; !CUl1L1DSi
while ((j = k << 1) <= size) { 8{jXSCP#
if (j < size %26amp;%26amp; queue[j] j++; E%bhd4$G
if (queue[k]>queue[j]) file://不用交换 ).^d3Kp
break; ]UkH}Pt'3
SortUtil.swap(queue,j,k); UE'=9{o`
k = j; ?9()ya-TE
} A,.X
} m"9f(
private void fixUp(int k) { `f;w
while (k > 1) { 9!jPZn
int j = k >> 1; Mwnr4$]
if (queue[j]>queue[k]) 0~fjY^(
break; 4C=W~6~
SortUtil.swap(queue,j,k); 6^gp /{
k = j; !^%3
} FB[b]+t`D{
} LG&BWs!
D6Ad"|Z
} )k=KLQ\b
:')[pO_FW*
} p-}X=O$
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SortUtil： @e)}#kN.
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package org.rut.util.algorithm; X%'z
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import org.rut.util.algorithm.support.BubbleSort; W^[FWFUTY
import org.rut.util.algorithm.support.HeapSort; ]?4;Lw
import org.rut.util.algorithm.support.ImprovedMergeSort; ~o!-[
import org.rut.util.algorithm.support.ImprovedQuickSort; !d N[9}
import org.rut.util.algorithm.support.InsertSort; b]]8Vs)'
import org.rut.util.algorithm.support.MergeSort; J#..xJ?XRD
import org.rut.util.algorithm.support.QuickSort; ;\*3A22 #
import org.rut.util.algorithm.support.SelectionSort; J,?#O#j
import org.rut.util.algorithm.support.ShellSort; \EfX3ghPI
49MEGl;K0\
/** ,/w*sE
* @author treeroot ~(V\.hq
* @since 2006-2-2 G]>yk_#/\U
* @version 1.0 zL yI|%KH
*/ )$n%4 :
public class SortUtil { /A7( `l;6
public final static int INSERT = 1; r!Aj5
public final static int BUBBLE = 2; eB5>uKa
public final static int SELECTION = 3; mU #F>
public final static int SHELL = 4; W'@|ob
public final static int QUICK = 5; M-^I!C
public final static int IMPROVED_QUICK = 6; X`D2w:
public final static int MERGE = 7; j?2~6W/[
public final static int IMPROVED_MERGE = 8; ({!!b"B2
public final static int HEAP = 9; ""-wM~^D
}YDi/b7
public static void sort(int[] data) { 5tlRrf
sort(data, IMPROVED_QUICK); 1tNL)x"w
} %Ln`c.C
private static String[] name={ :.x(( FU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" efQ8jO
}; aO&U=!
5%Qxx\q
private static Sort[] impl=new Sort[]{ *2zp>(%
new InsertSort(), BmX'%5ho
new BubbleSort(), a#j,0FKv
new SelectionSort(), IIR+qJ__|
new ShellSort(), y&$n[j
new QuickSort(), #|b*l/t8
new ImprovedQuickSort(), wm`<+K
new MergeSort(), t*(bF[?
new ImprovedMergeSort(), x4^nT=?6_
new HeapSort() D;Qx9^.
}; D^6*Cwb
XG/xMz~
public static String toString(int algorithm){ Ooz,?wU6
return name[algorithm-1]; .==D?#bn
} /L^g. ~
b&rBWp0#
public static void sort(int[] data, int algorithm) { ps{4_V-3u
impl[algorithm-1].sort(data); K}l3t2uk
} !zE{`Ha~
Q VTL}AT2:
public static interface Sort { ;_cTrjMv\
public void sort(int[] data); _N`.1Dl%Q
} ?Y~t{5NJR
DhM=q
public static void swap(int[] data, int i, int j) { Pm/<^z%
int temp = data; xWG@<}H
data = data[j]; sq'm)g
data[j] = temp; kOQ)QX
} I0}.!
} ukR0E4p