[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; ,CvU#ab8$
} l@GpVdrv
int i1=l; F4PD3E_#
int i2=mid+1; me9RnPe:
for(int cur=l;cur<=r;cur++){ |, :(3Ml
if(i1==mid+1) H37Z\xS
data[cur]=temp[i2++]; 3C[;2
else if(i2>r) |l~ADEg
data[cur]=temp[i1++]; 7>4t{aRf_8
else if(temp[i1] data[cur]=temp[i1++]; Oc8+an1m
else A^m hPBT_
data[cur]=temp[i2++]; LZ@^ A]U
} h&Sl8$jVp
} _}\&;
F )tNA?p)
} U%#=d@?
:@p`E}1r{
改进后的归并排序: c.XLEjV|
h(zi$V
package org.rut.util.algorithm.support; Obd!
N7e^XUG
import org.rut.util.algorithm.SortUtil; SY{J
Zdak))7
/** NN$`n*;l
* @author treeroot QoW3*1o
* @since 2006-2-2 xq]&XlA:ug
* @version 1.0 ,CdI.kV>o2
*/ #2dmki"~(
public class ImprovedMergeSort implements SortUtil.Sort { ZzE&?
m]%cNxS
private static final int THRESHOLD = 10; FqiK}K.~/
J d`NS3;*p
/* ,rN7X<s54
* (non-Javadoc) 4x3`dvfp/
* gf!j|O;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a( qw
*/ z4<h)hh"k6
public void sort(int[] data) { 4bKZ@r%
int[] temp=new int[data.length]; _6|b0*jv'&
mergeSort(data,temp,0,data.length-1); bv] ZUF0
} qR1ez-#K
[m"X*ZF
private void mergeSort(int[] data, int[] temp, int l, int r) { B^OhL!*tI
int i, j, k; -8TLnl~[
int mid = (l + r) / 2; O 8fh'6
if (l == r) }{ P}P}
return; |?0C9
if ((mid - l) >= THRESHOLD) g,1\Gj%y
mergeSort(data, temp, l, mid); 2{%BQq>C
else |_A35"v
insertSort(data, l, mid - l + 1); 3Y8%5/D5
if ((r - mid) > THRESHOLD) CR_A{(
mergeSort(data, temp, mid + 1, r); qzH97<M}T
else e5AiIVlv
insertSort(data, mid + 1, r - mid); B.{yf4a#L
/f2*J
for (i = l; i <= mid; i++) { \;sUJr"$
temp = data; a7CJ~8-1K
} ?iq:Gf
for (j = 1; j <= r - mid; j++) { V^Nc0r
temp[r - j + 1] = data[j + mid]; Lkb?,j5
} >97V2W
int a = temp[l]; ?>w%Lg{L}
int b = temp[r]; 0)nU[CY
for (i = l, j = r, k = l; k <= r; k++) { [k.<x'#
if (a < b) { A/o=a#
data[k] = temp[i++]; Z)ObFJMG5
a = temp; !W6]+
} else { u=4tW:W,
data[k] = temp[j--]; j#Y8h5r
b = temp[j]; HWc=.Qq
} | 0&~fY
} w+JDu_9+A]
} jfI|( P
8J>s|MZ
/** tewC *%3V
* @param data z,^baU
* @param l =XqmFr;h
* @param i 9iGJYMWf
*/ }3QEclZr
private void insertSort(int[] data, int start, int len) { "d{ |_Cf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;8ugI
} h>fY'r)DAx
} R@ihN?k
} Bf8 #&]O
} =WHdy;
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堆排序： 0(64}T)
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package org.rut.util.algorithm.support; 1YQ|KJ*K
}2G'3msx
import org.rut.util.algorithm.SortUtil; mgg/i@(
0b4QcfB1[
/** Yz[^?M%(D
* @author treeroot O,hT< s "
* @since 2006-2-2 h19c*,0z!
* @version 1.0 yv&&x.!.Z
*/ GsxrqIaD
public class HeapSort implements SortUtil.Sort{ 6=iz@C7r
+1_NB;,e
/* (non-Javadoc) @/7tN3O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lxs
*/ s)\%%CM
public void sort(int[] data) { =M>pL+#
MaxHeap h=new MaxHeap(); }c$Zlb
h.init(data); a!]'S4JS
for(int i=0;i h.remove(); +Y6=;*j$
System.arraycopy(h.queue,1,data,0,data.length); O*X]oX
} &KT*rL
lEh;MJ
private static class MaxHeap{ S&q@M
:H@Q`g u
void init(int[] data){ % tTL
this.queue=new int[data.length+1]; ")}^\Om
for(int i=0;i queue[++size]=data; V9mqJRFJ:
fixUp(size); At@H
} 49W@?:b
} '1'De^%6W
V:s$V.{!
private int size=0; &e0BL z
%-1-y]R|
private int[] queue; fh,kbn==r?
d|;S4m`
public int get() { ,1&Pb %}
return queue[1]; 6V-u<FJ
} 7@oM?r7td
6?i]oy^X]p
public void remove() { /N'0@q
SortUtil.swap(queue,1,size--); ;UUpkOQO(
fixDown(1); 'guXdX]Gu
} $lVR6|n
file://fixdown A{NKHn>%`
private void fixDown(int k) { !LJEo>D
int j; /<C}v~r
while ((j = k << 1) <= size) { Y&wtF8
if (j < size %26amp;%26amp; queue[j] j++; !>RDHu2n
if (queue[k]>queue[j]) file://不用交换 Jui:Ms
break; Rxb?SBa
SortUtil.swap(queue,j,k); AS5'j
k = j; *^aEUp6&
} L)(JaZyV5
} w2X0.2)P2
private void fixUp(int k) { *yl?M<28
while (k > 1) { -d>2&)5
int j = k >> 1; yM}~]aQ y
if (queue[j]>queue[k]) u1 Z;n
break; }Wlm#t
SortUtil.swap(queue,j,k); 1aAY7Dm_&
k = j; R`5g#
} Ms=5*_J2Jk
} u}r>?/V!
A>\5fO
} *jR4OY|DXH
/ <C{$Gu
} h*>%ou
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SortUtil： Xfc+0$U@
-.@dA'j[
package org.rut.util.algorithm; 3#A4A0
g?.y7!m
import org.rut.util.algorithm.support.BubbleSort; Y5{KtW
import org.rut.util.algorithm.support.HeapSort; `' .;U=mF
import org.rut.util.algorithm.support.ImprovedMergeSort; q@Aw]Kh
import org.rut.util.algorithm.support.ImprovedQuickSort; -=cxUDB
import org.rut.util.algorithm.support.InsertSort; u4#YZOiY)A
import org.rut.util.algorithm.support.MergeSort; )-\C{>
import org.rut.util.algorithm.support.QuickSort; -1{f(/
import org.rut.util.algorithm.support.SelectionSort; vX@TZet0
import org.rut.util.algorithm.support.ShellSort; `5Bv2wlIV
&HQ_e$1
/** c>Tf@Aog>
* @author treeroot U)[LKO1
* @since 2006-2-2 kzk8b?rOA
* @version 1.0 skm~~JM^
*/ .C\2f+(U
public class SortUtil { 4Ei8G]O $_
public final static int INSERT = 1; x2,;ar\D
public final static int BUBBLE = 2; =Vm3f^
public final static int SELECTION = 3; z]2MR2W@X
public final static int SHELL = 4; ExhK\J
public final static int QUICK = 5; 0GlQWRa
public final static int IMPROVED_QUICK = 6; /a*8z,x
public final static int MERGE = 7; *sQ.y {
public final static int IMPROVED_MERGE = 8; Gf +>AjU'
public final static int HEAP = 9; v2IcDz`}7
.-'_At4g
public static void sort(int[] data) { 0bpGPG's&
sort(data, IMPROVED_QUICK); 9Af nMD
} fH@cC`
private static String[] name={ <0VC`+p<)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^F'~|zc"C
}; w&@zJ[
2$o#b.
private static Sort[] impl=new Sort[]{ R4X9g\KpAt
new InsertSort(), ?S;z!) H)P
new BubbleSort(), 7H*,HZc@=
new SelectionSort(), 7+88o:G9
new ShellSort(), qnHjwMi
new QuickSort(), _&(L{cFx6
new ImprovedQuickSort(), &.(iS
new MergeSort(), L8q#_k
new ImprovedMergeSort(), |"PS e~ u
new HeapSort() *s#6e}
}; "n{';Q)
x ;~;Ah.p
public static String toString(int algorithm){ :@@`N_2?
return name[algorithm-1]; M@l|n
} M,W-,l ]
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public static void sort(int[] data, int algorithm) { kL8E#
impl[algorithm-1].sort(data); 2 FoLJ
} s$zm)y5
:IU<AG6
public static interface Sort { E=8GSl/Jx
public void sort(int[] data); VFM!K$_
} 33KCO
U'msHF
public static void swap(int[] data, int i, int j) { Q>$lf.)
int temp = data; } xA@3RT
data = data[j]; $IS!GS&:
data[j] = temp; KgbBa2@+
} s?s,wdp
} 7x77s