[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; fI}-?@
} LJI&j \
int i1=l; I-;JDC?
int i2=mid+1; qD`')=
for(int cur=l;cur<=r;cur++){ @6t3Us~/
if(i1==mid+1) eb( =V*
data[cur]=temp[i2++]; 0}P&G^%"
else if(i2>r) O\G%rp L$w
data[cur]=temp[i1++]; *sL'6"#Cre
else if(temp[i1] data[cur]=temp[i1++]; +.>O%pNj
else z!RA=]3h
data[cur]=temp[i2++]; Z39^nGO
} wBeOMA
} &dOV0y_
Q[~O`Lz
} p&ow\AO
P#EqeO
改进后的归并排序: `o:)PTQNg
$g1p!
package org.rut.util.algorithm.support; JTz1M~
@&h<jM{D
import org.rut.util.algorithm.SortUtil; 0imz}Z]
uy`U1>
/** S6]D;c8GE
* @author treeroot 's&Vg09D,
* @since 2006-2-2 '*)!&4f
* @version 1.0 U?>zq!C&R
*/ V(w[`^I>~
public class ImprovedMergeSort implements SortUtil.Sort { ^P{'l^CVX
hXMC!~Th
private static final int THRESHOLD = 10; EaP#~x
+S3'ms
/* .cu5h
* (non-Javadoc) 9N'$Y*. d<
* CQv [Od
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -R&h?ec
*/ b_wb!_
public void sort(int[] data) { %lV>Nc|iz=
int[] temp=new int[data.length]; .h7b 4J
mergeSort(data,temp,0,data.length-1); sav2.w
} MfYe @;m
=Oo*7|Z
private void mergeSort(int[] data, int[] temp, int l, int r) { MJ92S(
int i, j, k; 4@8i,q>
int mid = (l + r) / 2; 0udE\/4!^
if (l == r) TOBAh.1
return; kdWi!Hp
if ((mid - l) >= THRESHOLD) 4|Y0$(6o
mergeSort(data, temp, l, mid); 9Ft)VX
else yn%w'
insertSort(data, l, mid - l + 1); co~TQpy^
if ((r - mid) > THRESHOLD) <(^-o4Cl
mergeSort(data, temp, mid + 1, r); Nwu#,f=X
else nLQ X?:
insertSort(data, mid + 1, r - mid); uO":\<1#
L(8Q%oX%o
for (i = l; i <= mid; i++) { h\.UUC&<
temp = data; # ^%'*/z
} R;;)7|;~
for (j = 1; j <= r - mid; j++) { +;*])N%q
temp[r - j + 1] = data[j + mid]; XeZv%` ?
} q<;9!2py
int a = temp[l]; ly^F?.e-
int b = temp[r]; yGN<.IP75
for (i = l, j = r, k = l; k <= r; k++) { hcN$p2-
if (a < b) { _L: /2
data[k] = temp[i++]; *$hO C%(
a = temp; -iJ[9O
} else { xQmk2S` y
data[k] = temp[j--]; Kvk;D ]$
b = temp[j]; if`/LJsa
} :$94y{
} ^ro?.,c T
} S++}kR);
ZZeqOu7^
/** u\Xi]pZ@X]
* @param data "M?(Ax
* @param l NtA}I)'SWU
* @param i *, {b]6v
*/ n P69W
private void insertSort(int[] data, int start, int len) { wefQmRK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1p{\jCi,2
} ^&cI+xZ2Y
} mBnC]$<R
} uF<F4m;
} Duz}e80
>iG`
堆排序： xy|;WB
63k8j[$
package org.rut.util.algorithm.support; IAtc^'l#
^Yn6kF
import org.rut.util.algorithm.SortUtil; 5E.cJ{
sN;U,{
/** yJKezIL\z
* @author treeroot w[VWk
* @since 2006-2-2 sA` bPhk
* @version 1.0 N>gv!z[E
*/ Ii4Byyfx
public class HeapSort implements SortUtil.Sort{ jh=:QP/
g/Qr]:;
/* (non-Javadoc) )Wc#?K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0|NbU
*/ jo"[$%0`
public void sort(int[] data) { ]")i~-|R
MaxHeap h=new MaxHeap(); vKI,|UD&-
h.init(data); "+7~C6[s
for(int i=0;i h.remove(); i5)trSM|
System.arraycopy(h.queue,1,data,0,data.length); m=opY~&h
} %K/rPhU
-R:1-0I$
private static class MaxHeap{ [bv.`
xeu] X|,
void init(int[] data){ KK7Y"~ 9&-
this.queue=new int[data.length+1]; o+q5:vJt
for(int i=0;i queue[++size]=data; ;f6G&>p
fixUp(size); q Rtgk
} ^ ]`<nO
} qdcCX:Z<
d/* [t!
private int size=0; w0 "h,{
m&; t;&#
private int[] queue; IOfo]p-
qOk4qbl[
public int get() { l "d&Sgnj
return queue[1]; nYE_WXY3V
} ~){*XJw6
h`5au<h<
public void remove() { P;A"`Il
SortUtil.swap(queue,1,size--); N\xqy-L9
fixDown(1); D* Vr)J
} *y`^Fc
file://fixdown ?+dI/jB4X
private void fixDown(int k) { Y6g[y\*t
int j; ;E##bdSCA
while ((j = k << 1) <= size) { m2N ?Fg
if (j < size %26amp;%26amp; queue[j] j++; }3vB_0[r
if (queue[k]>queue[j]) file://不用交换 &jg,8
break; <QszmE
SortUtil.swap(queue,j,k); fHwh6|
k = j; ;9;.!4g/T
} Mu{mj4Y{
} E!ZDqq
private void fixUp(int k) { v&uIxFCR
while (k > 1) { JRl8S
int j = k >> 1; ayC*n'
if (queue[j]>queue[k]) ;/e!!P]jP
break; A03PEaZO
SortUtil.swap(queue,j,k); fC(lY4,H3R
k = j; s7&%_!4
} u8o!ncy
} |w\D6d]o
85nUR[)h
} F\>`j
i8A5m@,G
} ^t#]E#
_}Z*%sT
SortUtil： PhW#=S
q9!5J2P
package org.rut.util.algorithm; VEz&TPu
o5zth^p[
import org.rut.util.algorithm.support.BubbleSort; {!E<hQ2<$9
import org.rut.util.algorithm.support.HeapSort; ku`'w;5jT
import org.rut.util.algorithm.support.ImprovedMergeSort; v<;,x
import org.rut.util.algorithm.support.ImprovedQuickSort; sPbtv[bC
import org.rut.util.algorithm.support.InsertSort; rWa7"<`p
import org.rut.util.algorithm.support.MergeSort; $\0j:<o
import org.rut.util.algorithm.support.QuickSort; :X@;XEol~
import org.rut.util.algorithm.support.SelectionSort; "I_3!Yu
import org.rut.util.algorithm.support.ShellSort; M@csB.'
4W^0K|fq
/** b_][Jye&P
* @author treeroot s{A-K5S
* @since 2006-2-2 ^\_`0%`>
* @version 1.0 >-oa`im+
*/ [[TB.'k
public class SortUtil { xazh8X0P
public final static int INSERT = 1; zwAuF%U
public final static int BUBBLE = 2; ~r|.GY
public final static int SELECTION = 3; 9X=#wh,q
public final static int SHELL = 4; e2Xx7*vS
public final static int QUICK = 5; m#8KCZS
public final static int IMPROVED_QUICK = 6; BNaZD<<
public final static int MERGE = 7; 1w\Y._jK
public final static int IMPROVED_MERGE = 8; /\Q{i#v
public final static int HEAP = 9; W%Um:C\I
@|5B
public static void sort(int[] data) { ztb2Ign<
sort(data, IMPROVED_QUICK); =Jem.Ph
} YM#XV*P0 q
private static String[] name={ y)/d-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hWDgMmo7
}; PqvwM2}4
$aGK8%.O
private static Sort[] impl=new Sort[]{ 5%G++oLXf
new InsertSort(), $\a;?>WA"
new BubbleSort(), Bt.W_p
new SelectionSort(), n>iPAD
new ShellSort(), {4:En;
new QuickSort(), #=$4U!yL
new ImprovedQuickSort(), a^sR?.+3
new MergeSort(), F3wRHq
new ImprovedMergeSort(), M2V.FYV{j>
new HeapSort() 3ON]c13
}; {\0R[+d
/:%^Vh3XF
public static String toString(int algorithm){ q^12Rj;H
return name[algorithm-1]; tkJ/h<
} : l]>nF4
?g<*1N?:
public static void sort(int[] data, int algorithm) { '#q"u y
impl[algorithm-1].sort(data); E$Ge# M@dM
} Y*"%;e$tg
xD_jfAH'
public static interface Sort { 2RM1-j ($
public void sort(int[] data); gqe z-
} 8V4Qyi|@F
2c+q~8Jv
public static void swap(int[] data, int i, int j) { Y!Z@1V`
int temp = data; 8vUP{f6{
data = data[j]; O4-UVxv}
data[j] = temp; ',O@0L]L
} f \4Qp
} wmoOp;C