[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; R `;o!B}[
} 1 h<fJzh
int i1=l; jZrY=f
int i2=mid+1; j: <t
for(int cur=l;cur<=r;cur++){ -{!&/;Z
if(i1==mid+1) BwJNi6,
data[cur]=temp[i2++]; NtHbwU,
else if(i2>r) v-ThdE$G#
data[cur]=temp[i1++]; GSQfg
else if(temp[i1] data[cur]=temp[i1++]; q1UBKhpnH
else 0[lS(K
data[cur]=temp[i2++]; '#H&:Htm;L
} ab{;Z5O
} !{IC[g n
jUYF.K&
} YjFWC!Qj$
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改进后的归并排序: [d0%.+U
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package org.rut.util.algorithm.support; Fl<(m
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import org.rut.util.algorithm.SortUtil; HP;|'b
VR"8Di&)
/** MM7"a?y)
* @author treeroot s}jlS
* @since 2006-2-2 1sD~7KPg?
* @version 1.0 *h2`^Z
*/ hPcS, p{%
public class ImprovedMergeSort implements SortUtil.Sort { 1c'79YU
5KK{%6#f\
private static final int THRESHOLD = 10; "rVU4F)
T4eWbNSs
/* THJ 3-Ug
* (non-Javadoc) oK)[p!D?0{
* Q2q|*EL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Eevw*;$x
*/ $iwIF7,\P
public void sort(int[] data) { ^dh=M5xz)
int[] temp=new int[data.length]; ?<E0zM+
mergeSort(data,temp,0,data.length-1); :aH%bk
} =m~ruZ/
)]wuF`
private void mergeSort(int[] data, int[] temp, int l, int r) { bCzdszvg3
int i, j, k; 4X*Q6rW
int mid = (l + r) / 2; Uh*@BmDA
if (l == r) w3d34*0$
return; (oF-O{
if ((mid - l) >= THRESHOLD) # J]~
mergeSort(data, temp, l, mid); uNy!<u
else %w$mSG
insertSort(data, l, mid - l + 1); ?;_H{/)m
if ((r - mid) > THRESHOLD) <z',]hy
mergeSort(data, temp, mid + 1, r); +ZX.1[O
else Y3<b~!f
insertSort(data, mid + 1, r - mid); X CzXS.
+|9f%f6vp
for (i = l; i <= mid; i++) { a/b92*&k
temp = data; kB V/rw
} >{b3>s~T
for (j = 1; j <= r - mid; j++) { SAy{YOLtl
temp[r - j + 1] = data[j + mid]; s047"Q
} LaclC]yLU
int a = temp[l]; %uua_&#)
int b = temp[r]; i$["aP~G
for (i = l, j = r, k = l; k <= r; k++) { J]dW1boT@
if (a < b) { ~?CS_B *
data[k] = temp[i++]; *.o"ZVl
a = temp; 3+%nn+m
} else { z<i,D08|d
data[k] = temp[j--]; ;7L;
b = temp[j]; 3 &Sp@,
} k1RV'
} /eb-'m
} !O8.#+
^iuo^2+
/** D&-vq,c
* @param data i+I0k~wY
* @param l /~tP7<7A
* @param i :s]\k%"
*/ jccOsG9;_
private void insertSort(int[] data, int start, int len) { %7 /,m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #hy+ L
} AC'lS >7s
} >P<'L4;
} zC#%6@P\
} 2 ZK%)vq0
m2Q$+p@
堆排序： i\ "{#
L?Cjo4xS
package org.rut.util.algorithm.support; l/QhD?)9
&y\igX1
import org.rut.util.algorithm.SortUtil; (Igu:=
>x*)GPDa
/** g8'~e{=(
* @author treeroot 3 1k
* @since 2006-2-2 >4M<W4
* @version 1.0 yuv4*
*/ "|hlDe<
public class HeapSort implements SortUtil.Sort{ 8+ hhdy*b
` .$&T7
/* (non-Javadoc) o[oqPN3$Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x)$2nonM
*/ }2=hd..
public void sort(int[] data) { !vVT]k[N
MaxHeap h=new MaxHeap(); WGPD8.
h.init(data); 5D L,U(Y
for(int i=0;i h.remove(); 8gAu7\p}
System.arraycopy(h.queue,1,data,0,data.length); )P%4:P
} E<k^S{
fdLBhe#9M
private static class MaxHeap{ hX3@f;[B2
QvJZkGX
void init(int[] data){ =|"=l1
this.queue=new int[data.length+1]; w&5/Zh[~~L
for(int i=0;i queue[++size]=data; ntZ~m
fixUp(size); *E7R(#,yC
} ,_bp)-OG
} xh r[A
}#bZ8tm&
private int size=0; GMw)*
bJ6p,]g
private int[] queue; &Sa~/!M
<]'|$8&jY
public int get() { {Zl4C;c
return queue[1]; XL~>rw<
} 7@3sUA_Go
hkF^?AJ
public void remove() { &`@lB (m
SortUtil.swap(queue,1,size--); #N9d$[R*
fixDown(1); NNp}|a9
} T%~SM5
file://fixdown $+jy/:]D
private void fixDown(int k) { ]x_F{&6U8
int j; 7>mhK7l
while ((j = k << 1) <= size) { 2LZS|fB9o
if (j < size %26amp;%26amp; queue[j] j++; RY<%'\A`~
if (queue[k]>queue[j]) file://不用交换 dm& /K 4c
break; 7_%2xewV|
SortUtil.swap(queue,j,k); ~1ps7[
k = j; t)'dF*L
} z<h|#@\
} 1daL y
private void fixUp(int k) { QoseS/
while (k > 1) { jzMg'z/@J
int j = k >> 1; 0Az/fzJlz
if (queue[j]>queue[k]) ZRPy~wy>
break; K"^cq~
SortUtil.swap(queue,j,k); O{u[+g
k = j; M}KZG'7
} `-u7 I
} 67?n-NP
RJwb@r<v
} [Xq<EEb
gb(#DbI
} M?R!n$N_
J^h'9iQpi
SortUtil： 6%UY1Q.?
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package org.rut.util.algorithm; xG w?'\
&+]x;K
import org.rut.util.algorithm.support.BubbleSort; B\/7^{i5
import org.rut.util.algorithm.support.HeapSort; o X@nP?\
import org.rut.util.algorithm.support.ImprovedMergeSort; )$h-ZYc
import org.rut.util.algorithm.support.ImprovedQuickSort; YuA7r"c
import org.rut.util.algorithm.support.InsertSort; ^}@`!ON
import org.rut.util.algorithm.support.MergeSort; U3+A MVnB
import org.rut.util.algorithm.support.QuickSort; Bz:&f46{
import org.rut.util.algorithm.support.SelectionSort; %",ULtZ+
import org.rut.util.algorithm.support.ShellSort; SBz/VQ
>>j+LRf*
/** #4N >d~
* @author treeroot p {?}g'
* @since 2006-2-2 (V)9s\Le_
* @version 1.0 #'8)u)!
*/ 6i-*N[!U
public class SortUtil { )WmZP3$^TX
public final static int INSERT = 1; 1\IZcJ {
public final static int BUBBLE = 2; t2U$m'(A&
public final static int SELECTION = 3; vbedk+dd?A
public final static int SHELL = 4; m#;.yR
public final static int QUICK = 5; |eF.ZC)QWh
public final static int IMPROVED_QUICK = 6; ,H@TYw
public final static int MERGE = 7; b*`fLrqV.
public final static int IMPROVED_MERGE = 8; CC>($k"
public final static int HEAP = 9; L&QtHSzy
Q K j1yG0i
public static void sort(int[] data) { yi|:}K$
sort(data, IMPROVED_QUICK); s&0*'^'O[S
} j3LNnZY
private static String[] name={ 0R*}QXph
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NN11}E6
}; Kk`<f d
G>JxIrN0
private static Sort[] impl=new Sort[]{ J+iX,X
new InsertSort(), z1FL8=
new BubbleSort(), Bd8hJA
new SelectionSort(), nSS}%&a:LX
new ShellSort(), GRy4cb2
new QuickSort(), H6{Rd+\Z
new ImprovedQuickSort(), QY=QQG
new MergeSort(), ^(J-dK
new ImprovedMergeSort(), Cc*|Zw
new HeapSort() "raj>2@
}; .T{U^0 )
>pnz_MQ
public static String toString(int algorithm){ =/m}rcDN
return name[algorithm-1]; PYaOH_X.
} }^Z< dbt
OoSa95#x
public static void sort(int[] data, int algorithm) { *5^ze+:
impl[algorithm-1].sort(data); TD%WJ9K\
} Fos1WH?\
1&}G+y
public static interface Sort { ONNW.xHp
public void sort(int[] data); 'h k @>"
} .C6gl]6y@
*50ZinfoG
public static void swap(int[] data, int i, int j) { [-QK$~[ g
int temp = data; 4">84,-N
data = data[j]; f}A^]6MO:
data[j] = temp; )|Jr|8
} X=\x&Wt
} D8W(CE^}