[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; 3DU1c?M:
} |)-kUu
int i1=l; I>c,Bo7
int i2=mid+1; Dk1& <} I
for(int cur=l;cur<=r;cur++){ _;lw,;ftA
if(i1==mid+1) \}jMC
data[cur]=temp[i2++]; b}e1JPk}!
else if(i2>r) Q&9yrx.
data[cur]=temp[i1++]; 0I}e>]:I
else if(temp[i1] data[cur]=temp[i1++]; sZ;|NAx)
else 96=<phcwN[
data[cur]=temp[i2++]; l_B735
} kfy!T rf
} 0|3I^b
C2 N+X(
} \Mf>X\}
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改进后的归并排序: O-iE0t
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package org.rut.util.algorithm.support; Q*ITs!~Z
4l D$'`
import org.rut.util.algorithm.SortUtil; "oP^2|${
_Q V=3UWP
/** jhu &Wh
* @author treeroot mHD_cgKN
* @since 2006-2-2 [Nyt0l "z
* @version 1.0 G0FzXtu)q
*/ =BJLj0=N
public class ImprovedMergeSort implements SortUtil.Sort { _e%D/}
W4^L_p>Tm^
private static final int THRESHOLD = 10; i'~-\F!
m/HT3<F
/* 3JazQU
* (non-Javadoc) w5FIHYl6B
* 0K!3Ny9(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FU`(mQ*Yd
*/ \#sD`O
public void sort(int[] data) { |IxHtg3>6{
int[] temp=new int[data.length]; cNll??j
mergeSort(data,temp,0,data.length-1); *TOdIq&z
} 5Xy(za
Ky3mzw|
private void mergeSort(int[] data, int[] temp, int l, int r) { mz?<t/$U
int i, j, k; _&KqmQ8$7
int mid = (l + r) / 2; awLvLkQb{
if (l == r) =lacfPS
return; r>mBe;[TX
if ((mid - l) >= THRESHOLD) y\Wn:RR1[
mergeSort(data, temp, l, mid); -t-f&`S||
else JsaXI:%1
insertSort(data, l, mid - l + 1); #G9 W65f
if ((r - mid) > THRESHOLD) ns[/M~_r
mergeSort(data, temp, mid + 1, r); 8$FH;=
else L!f~Am:#
insertSort(data, mid + 1, r - mid); g)Z8WH$;H3
+LHU}'|
for (i = l; i <= mid; i++) { Iu'9yb
temp = data; 7UTfafOGX
} srS!X$cec
for (j = 1; j <= r - mid; j++) { ]4~Yi1]
temp[r - j + 1] = data[j + mid]; B4s$| i{D
} &61U1"&$R
int a = temp[l]; Sv=YI
int b = temp[r]; 0d2P
for (i = l, j = r, k = l; k <= r; k++) { oZ{,IZ45
if (a < b) { _{|a<Keq|
data[k] = temp[i++]; ~!uX"F8Xl
a = temp; }G4I9Py
} else { R~<N*En~
data[k] = temp[j--]; +'F;\E
b = temp[j]; 14$%v;Su4
} -"-.Z&#
} _z p<en[
} (l5p_x
7cc^n\c?Y
/** *%uzLW0
* @param data gUiO66#x
* @param l wd:Yy
* @param i r3V1l8MV
*/ `IN!#b+Eo
private void insertSort(int[] data, int start, int len) { s|IBX0^@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pPL=(9d
} n7> |$2Y
} @Y0ZW't
} %/dOV[/
} $(}rTm
CU=sQfE
堆排序： ]p|?S[!=
MlTC?Rp#
package org.rut.util.algorithm.support; u|KjoO
0 u*a=f=
import org.rut.util.algorithm.SortUtil; +~n:*\
H&-3`<
/** W"=l@}I
* @author treeroot MKbcJZe
* @since 2006-2-2 H*]Vs=1
* @version 1.0 A%#M#hD/
*/ tR51Pw
public class HeapSort implements SortUtil.Sort{ |!FQQ(1b
>5O~SF.
/* (non-Javadoc) G#[A'tbKk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3$hIc)
*/ 6UCF w>
public void sort(int[] data) { zS:2?VXxq
MaxHeap h=new MaxHeap(); 4?Y7.:x
h.init(data); :E}y Pcw
for(int i=0;i h.remove(); pW+uVv,
System.arraycopy(h.queue,1,data,0,data.length); 7V%P
} rp\`uj*D
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private static class MaxHeap{ |ufL s
LqYyIbsvf
void init(int[] data){ np2&W'C/i
this.queue=new int[data.length+1]; '( I0VJJ
for(int i=0;i queue[++size]=data; Cu`
fixUp(size); XQ~Xls%]
} ,>aa2
} {9(0s| pr
R'sNMWM
private int size=0; "BsK'yo.
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private int[] queue; IP/%=m)\%
HW]?%9a
public int get() { ~AjPa}@ f
return queue[1]; s,r|p@^
} i&m_G5u88
N!c FUZ5]
public void remove() { O?g;Ny
SortUtil.swap(queue,1,size--); |Uics:cQC
fixDown(1); H.ZF~Yuw
} :%& E58
file://fixdown hZfj$|<
private void fixDown(int k) { |&"aZ!Kn
int j; O*v&CHd3
while ((j = k << 1) <= size) { FzEs1hpl
if (j < size %26amp;%26amp; queue[j] j++; >3p~>;9sc
if (queue[k]>queue[j]) file://不用交换 0Xb\w^
break; 7f+@6jqD\)
SortUtil.swap(queue,j,k); 8\68NG6o
k = j; f2[R2sto@
} s.p> ?U
} PwW$=M{\.
private void fixUp(int k) { ]+Lr'HF
while (k > 1) { pMT7/y-
int j = k >> 1; UhqTn$=fb
if (queue[j]>queue[k]) 9;Z{++z
break; {[#)Q.2
SortUtil.swap(queue,j,k); B!pz0K*uG
k = j; 9vP;i= fr
} 0?$|F0U"J
} 8OZasf
*-PjcF}Y
} 7zCJ3p
RAl/p9\A+
} lS9S7`
l,lqhq\
SortUtil： 5H.~pc2y
D&F{0
package org.rut.util.algorithm; EtzSaB*|
{Vj&i.2,
import org.rut.util.algorithm.support.BubbleSort; #M|lBYdW}
import org.rut.util.algorithm.support.HeapSort; @Pk<3.S0
import org.rut.util.algorithm.support.ImprovedMergeSort; xgMh@@e
import org.rut.util.algorithm.support.ImprovedQuickSort; ymxA<bICS8
import org.rut.util.algorithm.support.InsertSort; (9RfsV4^
import org.rut.util.algorithm.support.MergeSort; ,2$<Pt;
import org.rut.util.algorithm.support.QuickSort; !DOyOTR&3
import org.rut.util.algorithm.support.SelectionSort; jbipNgxkr
import org.rut.util.algorithm.support.ShellSort; :=y5713
1v|-+p42
/** "7y,d%H
* @author treeroot m|W17LhW{
* @since 2006-2-2 BL 1KM2]
* @version 1.0 W9]z]6
*/ H2BRId
public class SortUtil { uKAI->"
public final static int INSERT = 1; [TOo9W
public final static int BUBBLE = 2; %4m Nk}tyH
public final static int SELECTION = 3; s4_Dqm
public final static int SHELL = 4; z(LR!hr
public final static int QUICK = 5; 9{OO'at?
public final static int IMPROVED_QUICK = 6; 'wEQvCS
public final static int MERGE = 7; ^'E^*R
public final static int IMPROVED_MERGE = 8; Is4,QnY_[
public final static int HEAP = 9; y@7fR9hp<
A9b(P[!]T:
public static void sort(int[] data) { ^+D/59I
sort(data, IMPROVED_QUICK); nC p/.]Y*
} ?d3K:|g
private static String[] name={ +]cf/_8+s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =F$?`q`
}; :ZY%-]u7
%urvX$r4K
private static Sort[] impl=new Sort[]{ Rb:H3zh
new InsertSort(), 5NZuaN
new BubbleSort(), >[aR8J/U
new SelectionSort(), 1<'z)r4
new ShellSort(), )iw-l~y;
new QuickSort(), kMCP .D45;
new ImprovedQuickSort(), aC[G_ACwc
new MergeSort(), Oq~{HJ{
new ImprovedMergeSort(), y!gPBkG&3n
new HeapSort() `[5xncZ-
}; YCiG~y/~
g@^y$wt
public static String toString(int algorithm){ sPi
return name[algorithm-1]; `15}jTi
} >`UqS`YQK
*fc8M(]&d
public static void sort(int[] data, int algorithm) { }d}gb`Du
impl[algorithm-1].sort(data); HSNj
} Zzjx;SF
8_!qoW@B
public static interface Sort { Eh8GqFEM
public void sort(int[] data); }&=l)\e
} )1Bz0:
$/"Ymm#"\Y
public static void swap(int[] data, int i, int j) { TNqL ')f
int temp = data; 2x<BU3
data = data[j]; s U`#hL6;
data[j] = temp; 0bh 6ay4
} [8za=B/
} 1R8tR#l