[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; )%C.IZ_s2
} 4$-R|@,|_
int i1=l; I;4quFBlMu
int i2=mid+1; N&8$tJ(hhx
for(int cur=l;cur<=r;cur++){ ( 5LCy?-6
if(i1==mid+1) P1F-Wy1
data[cur]=temp[i2++]; V^7.@BeT
else if(i2>r) PT>b%7Of
data[cur]=temp[i1++]; 8h] TI_
else if(temp[i1] data[cur]=temp[i1++]; f&-`+V}U
else f+e"`80$*C
data[cur]=temp[i2++]; 1W|jC
} Ca-"3aQkc
} "L>'X22ed
!vz'zy)7
} hFV,FBsAO
rS@/@jKZE
改进后的归并排序: & SXw=;B
yP58H{hQM8
package org.rut.util.algorithm.support; 7?dWAUF
%&L13:
import org.rut.util.algorithm.SortUtil; b++r#Q g
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/** C'#KTp4!1
* @author treeroot 0["93n}r
* @since 2006-2-2 9#DXA}
* @version 1.0 Xi="gxp$%
*/ yZlT#^$\
public class ImprovedMergeSort implements SortUtil.Sort { Nd0tR3gi7
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private static final int THRESHOLD = 10; 6Zi{gx
juEPUsE
/* -y.cy'$f
* (non-Javadoc) >LBA0ynh {
* -Y_, .'ex
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S,5ok0R
*/ >a8iY|QY
public void sort(int[] data) { [8QK @5[
int[] temp=new int[data.length]; 93*csO?Db
mergeSort(data,temp,0,data.length-1); \[9VeqMU
} N[Z`tk?-
&d6@SQ
private void mergeSort(int[] data, int[] temp, int l, int r) { 12`u[O}\}-
int i, j, k; Zc7;&cz
int mid = (l + r) / 2; 7|}4UXr7y
if (l == r) KVZB`c$<t
return; R3B+vLGX
if ((mid - l) >= THRESHOLD) qO{z{@jo55
mergeSort(data, temp, l, mid); ZthT('"a
else JBY.er`6C
insertSort(data, l, mid - l + 1); Nh\vWAz9
if ((r - mid) > THRESHOLD) 'rhgM/I
mergeSort(data, temp, mid + 1, r); Lu#qo^
else ,z&S;f.f
insertSort(data, mid + 1, r - mid); <rzP
dN2JOyS
for (i = l; i <= mid; i++) { NK|UeL7ght
temp = data; GxdAOiq;
} &nEL}GM)E
for (j = 1; j <= r - mid; j++) { |k.'w<6mb9
temp[r - j + 1] = data[j + mid]; #xtH6\X
} xmg3,bO
int a = temp[l]; eiK_JPFA-
int b = temp[r]; *PF<J/Pr
for (i = l, j = r, k = l; k <= r; k++) { .n<vhLDQn
if (a < b) { $zP5Hzx
data[k] = temp[i++]; )Do 0
a = temp; U[wx){[|
} else { bq/Aopfr
data[k] = temp[j--]; kj6:P$tH
b = temp[j]; "2mPWRItO
} y% bIO6u:
} 4c5BlD
} wnS,Jl
f.w",S^
/** PK]3uh
* @param data +byOThuE
* @param l &ijz'Sg3
* @param i o/N!l]r
*/ =x<N+vjXY
private void insertSort(int[] data, int start, int len) { dlYpbw}W&<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AE rPd)yk0
} =|oi0
} %]+R>+
} BqNsW (+
} 6ll!7U(9(
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堆排序： 5/"$_7"{a
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package org.rut.util.algorithm.support; }n^Rcz6HeO
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import org.rut.util.algorithm.SortUtil; $d*9]M4
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/** kY)Vr3uGA
* @author treeroot (=j;rfvP
* @since 2006-2-2 b~aM=71
* @version 1.0 ](Fey0@
*/ /DAR'9@h
public class HeapSort implements SortUtil.Sort{ J?o
G*9(O:
/* (non-Javadoc) TUfj\d,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v0DDim?cc
*/ _=mzZe[
public void sort(int[] data) { R*r4)+gd
MaxHeap h=new MaxHeap(); UF+Qx/4h0
h.init(data); 2>o[
for(int i=0;i h.remove(); *2h%dT:,%
System.arraycopy(h.queue,1,data,0,data.length); G4(R/<J,BQ
} ?Bf>G]zx
Yc[umn^K
private static class MaxHeap{ `w!XO$"]Z
c5ij2X|I
void init(int[] data){ Y5aG^wE[:
this.queue=new int[data.length+1]; JI>Y?1i0O
for(int i=0;i queue[++size]=data; $cSUB
fixUp(size); }a;xs};X;
} R1zt6oY
} #Y=^4U`
gH//@`6
private int size=0; T]tP!a;K
+p%3pnj:K
private int[] queue; bv4umL /
^L%_kL_7
public int get() { t\,Y<9{w
return queue[1]; n{gEIUo#
} q%sZV>
lEk@I"
public void remove() { -PpcFLZ|
SortUtil.swap(queue,1,size--); COw"6czX/
fixDown(1); T8+[R2_
} i.E2a)
file://fixdown %axr@o[
private void fixDown(int k) { x_Ev2 c'4
int j; }5+^
while ((j = k << 1) <= size) { sa'1hX^@
if (j < size %26amp;%26amp; queue[j] j++; /"X_{3dq?
if (queue[k]>queue[j]) file://不用交换 x0# Bc7y
break; 0=>$J WF
SortUtil.swap(queue,j,k); Qj^Uz+b
k = j; CV0id&Nv
} Lap?L/NS
} %Y&48''"
private void fixUp(int k) { M/ 64`lcb
while (k > 1) { j!4{+&Laq
int j = k >> 1; SW9 C 8Q
if (queue[j]>queue[k]) z|>TkCW6
break; .`IhxE~mN
SortUtil.swap(queue,j,k); E+\?ptw
k = j; H_?rbz}o
} V#Wy` ce
} Kg6J:HD49
k-ZO/yPo
} 33~MP;
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} FtTq*[a
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SortUtil： 3H,x4L5j
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package org.rut.util.algorithm; c4AJ`f.5
k7U.]#5V
import org.rut.util.algorithm.support.BubbleSort; toA}0MI(:
import org.rut.util.algorithm.support.HeapSort; KPToyCyR1
import org.rut.util.algorithm.support.ImprovedMergeSort; 2G8w&dtu
import org.rut.util.algorithm.support.ImprovedQuickSort; }R;}d(C`
import org.rut.util.algorithm.support.InsertSort; Ae7FtJO
import org.rut.util.algorithm.support.MergeSort; $+80V{J#
import org.rut.util.algorithm.support.QuickSort; :u7BCV|yr
import org.rut.util.algorithm.support.SelectionSort; H8YwMhE7
import org.rut.util.algorithm.support.ShellSort; Z#}sK5s
J|I*n
/** {<{VJGY7T
* @author treeroot uUjjAGZ
* @since 2006-2-2 u.yR oZ8/!
* @version 1.0 +JI,6)Ry
*/ ;87PP7~
public class SortUtil { \lg ^rfj
public final static int INSERT = 1; Nk@-yZ@,8
public final static int BUBBLE = 2; L]MWdD
public final static int SELECTION = 3; ?q`i MiN
public final static int SHELL = 4; &KMI C
public final static int QUICK = 5; ;?{^LiD+F
public final static int IMPROVED_QUICK = 6; +2{ f>KZ
public final static int MERGE = 7; rfonM~3?'
public final static int IMPROVED_MERGE = 8; f:M^q ;
public final static int HEAP = 9; mP*$wE9b,:
y`j_]qvt
public static void sort(int[] data) { |-ZML~2S=h
sort(data, IMPROVED_QUICK); )<HvIr(xr
} :WRD<D_4
private static String[] name={ uzxwJs'fz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" = 9Yfo,F
}; fuj9x;8X0
L-- t(G
private static Sort[] impl=new Sort[]{ r]Hrz'C`
new InsertSort(), ,LwinjHA*
new BubbleSort(), ,<Cl^ ^a,
new SelectionSort(), -,/7u3
new ShellSort(), 0y|1@CS
new QuickSort(), ';G/,wB?`
new ImprovedQuickSort(), 4AL,=C3
new MergeSort(), PV\J] |d,%
new ImprovedMergeSort(), {-I+
new HeapSort() c!HGiqp
}; oOprzxf"+Z
*m]Y6
public static String toString(int algorithm){ {*;8`+R&
return name[algorithm-1]; K\ Wzh;
} g#i~^4-1
3chx4
public static void sort(int[] data, int algorithm) { WzFXF{(
impl[algorithm-1].sort(data); A!GvfmzqIn
} CE M4E
W^09tx/I
public static interface Sort { 07SW$INb
public void sort(int[] data); ga|<S@u?}
} _b8KK4UR
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public static void swap(int[] data, int i, int j) { s YTJ^Kd
int temp = data; 8{0XqE~ix=
data = data[j]; _v#puFy
data[j] = temp; Zsapu1HoL\
} oC" [rn
} a)W|gx6Y