[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; n_$ :7J
} el2bd :
int i1=l; xG}(5Tt
int i2=mid+1; A{UULVp
for(int cur=l;cur<=r;cur++){ y(Y!?X I
if(i1==mid+1) {88)~
data[cur]=temp[i2++]; eyefWn&
else if(i2>r) NZ;{t\
data[cur]=temp[i1++]; '#s05hr
else if(temp[i1] data[cur]=temp[i1++]; 0.dgoq3u
else xm%Um\Pb7
data[cur]=temp[i2++]; =jlt5 z
} VGtC)mG8)
} &Ts-a$Z7?S
O_$m!5ug
} zV:pQRbt.
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改进后的归并排序: Xg<*@4RD8
SeHagKA
package org.rut.util.algorithm.support; 9l}FU$
t0z!DOODZP
import org.rut.util.algorithm.SortUtil; ;w'D4p= P
`jzTmt
/** MxWy*|J}
* @author treeroot bSsh^Z
* @since 2006-2-2 *\=.<|HZ
* @version 1.0 ~GTz:nC*
*/ u@~JiiC%
public class ImprovedMergeSort implements SortUtil.Sort { n9@ of
f~Fm4>\(
private static final int THRESHOLD = 10; x\F,SEj
-`<kCW"
/* K#*reJ}K
* (non-Javadoc) !lEY=1nHOJ
* >wb'QzF:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SGh1 DB
*/ n3}!p'-CC
public void sort(int[] data) { *F ?8c
int[] temp=new int[data.length]; U"q/rcA
mergeSort(data,temp,0,data.length-1); )E6;-rD0^+
} b`)){LR
8aO~/i:(.
private void mergeSort(int[] data, int[] temp, int l, int r) { s_x:T<]
int i, j, k; @7n/Q(
int mid = (l + r) / 2; @kk4]:,w
if (l == r) ojQI7 Uhw
return; H,+I2tEs
if ((mid - l) >= THRESHOLD) H2Z1TIh
mergeSort(data, temp, l, mid); ]?3un!o3o
else zXv3:uRp.
insertSort(data, l, mid - l + 1); e_s&L,ze
if ((r - mid) > THRESHOLD) ?47@o1
mergeSort(data, temp, mid + 1, r); qtiz a~u
else 4!+pc-}-
insertSort(data, mid + 1, r - mid); _/Gczy4)#
V6t,BJjS
for (i = l; i <= mid; i++) { `kbSu}
temp = data; uwa~-xX6
} vJ\pR~?
for (j = 1; j <= r - mid; j++) { N` aF{3[
temp[r - j + 1] = data[j + mid]; a;QMAd!
} rA2g&
int a = temp[l]; 6b%WHLUeT
int b = temp[r]; ^xh}I5
for (i = l, j = r, k = l; k <= r; k++) { nA P.^_K
if (a < b) { L,mQ
data[k] = temp[i++]; PH?#)lD
a = temp; Sp7ld7c
} else { +<xQM h8
data[k] = temp[j--]; }Z{=|rVE
b = temp[j]; *H?!;u=8
} Gp4A.\7
} N5]0/,I}
} }b=}uiR#
:T]o)
/** xEf'Bmebk
* @param data VYt!U
* @param l sXi=70o
* @param i mjWU0Gh%*
*/ 2Yp7
private void insertSort(int[] data, int start, int len) { {]E+~%Va
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e&>;*$)
} )K,F]fc+O
} H2 $GIY
} %Eb%V($
} i/~1F_
S}$r>[t
堆排序： ms!ref4`+
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package org.rut.util.algorithm.support; ]4R[<<hd
jy giG&H
import org.rut.util.algorithm.SortUtil; =+-Yxh|*
jeGj<m
/** ]wKzE4Z/
* @author treeroot "I=\[l8t
* @since 2006-2-2 t5'V6nv
* @version 1.0 J9\a{c;.
*/ 9cEv&3
public class HeapSort implements SortUtil.Sort{ F>]m3(
zX0mdx<|<
/* (non-Javadoc) -RS7h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OCZ[D{i9@
*/ x9x E&
public void sort(int[] data) { 87:!C5e}
MaxHeap h=new MaxHeap(); 5B&;uY
h.init(data); C?i >.t
for(int i=0;i h.remove(); D\[h:8k
System.arraycopy(h.queue,1,data,0,data.length); ~er\~kp
} :>TEDy~O%
-O&CI)`;B
private static class MaxHeap{ E2cB U{x
oS7(s
void init(int[] data){ ^5A t?I8
this.queue=new int[data.length+1]; :WSDf VX
for(int i=0;i queue[++size]=data; DyQM>xw)t
fixUp(size); 1Wm)rXW[x
} *+uHQgn(
} 3&6#F"7
M/):e$S
private int size=0; ?0YCpn
&g.@u~SI1
private int[] queue; C4hx@abA
wE@'ap#
public int get() { )(tM/r4`c&
return queue[1]; )$`wIp
} Q%wY
{_Lgtu
public void remove() { 'Hi: 2Wh
SortUtil.swap(queue,1,size--); W-.pmU e2
fixDown(1); :$_6SQ<?
} H}H7lO
file://fixdown Nnk@h
private void fixDown(int k) { [Z~ 2
int j; ithewup
while ((j = k << 1) <= size) { LwhyE:1
if (j < size %26amp;%26amp; queue[j] j++; )13dn]o=2
if (queue[k]>queue[j]) file://不用交换 DK=cVpN%s
break; BCe|is0
SortUtil.swap(queue,j,k); &Ch#-CUE/
k = j; jL^](J>
} UN%Vg:=
} ^S)cjH`P
private void fixUp(int k) { Pt&(npjN,
while (k > 1) { ?gPKcjgoH!
int j = k >> 1; Q}!mx7b0]
if (queue[j]>queue[k]) $uap8nN
break; 5*E#*H
SortUtil.swap(queue,j,k); \MK*by
k = j; 6gT5O]]#o
} Pl<;[cB
} V^hE}`>z&
ZVbl88,(l
} e]T`ot#/
C=s1R;"H
} !A>z(eIsv`
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SortUtil： lj{VL}R
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package org.rut.util.algorithm; zOV=9"~{
t\RF=BbJJ
import org.rut.util.algorithm.support.BubbleSort; O/.Uh`T`6
import org.rut.util.algorithm.support.HeapSort; w,O,W[C
import org.rut.util.algorithm.support.ImprovedMergeSort; sTOa
import org.rut.util.algorithm.support.ImprovedQuickSort; /sr2mt-Q
import org.rut.util.algorithm.support.InsertSort; ;L|uIg;.s
import org.rut.util.algorithm.support.MergeSort; }g3+{\x8
import org.rut.util.algorithm.support.QuickSort; 01T`Flz
import org.rut.util.algorithm.support.SelectionSort; M;0]u.D*=
import org.rut.util.algorithm.support.ShellSort; fZxIY,
n.sbr
/** fM #7y [
* @author treeroot UG'bOF4
* @since 2006-2-2 Wm H~m k"
* @version 1.0 F q!fWl
*/ k{VE1@
public class SortUtil { (ewe"N+
public final static int INSERT = 1; y$3;$ R^
public final static int BUBBLE = 2; $5v0m#[^
public final static int SELECTION = 3; dJv!Dts')C
public final static int SHELL = 4; 'S2bp4G
public final static int QUICK = 5; K"uNxZ
public final static int IMPROVED_QUICK = 6; ->h6j
public final static int MERGE = 7; ? tfT8$
public final static int IMPROVED_MERGE = 8; 7HVZZ!>~
public final static int HEAP = 9; _;4 [Q1
7@6g<"I
public static void sort(int[] data) { 'kYwz;gp
sort(data, IMPROVED_QUICK); .i^7|o:
} X*Z8CM_
private static String[] name={ s;1]tD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S,U Pl}KF
}; /B5-Fx7j3
GZ{]0$9I'
private static Sort[] impl=new Sort[]{ \`, [)`
new InsertSort(), bsd99-_(4
new BubbleSort(), -!0_:m3
new SelectionSort(), kNT}dv]<
new ShellSort(), VyRsPg[(
new QuickSort(), v4RlLgdS%
new ImprovedQuickSort(), 6YuY|JD
new MergeSort(), l<Q>N|1#k%
new ImprovedMergeSort(), |oub!fG4
new HeapSort() d*oUfiW
}; DI`%zLDcY
,-+"^>
public static String toString(int algorithm){ j F-v%?
return name[algorithm-1]; X[2[!)Rk
} cpt<WK}
+n})Y
public static void sort(int[] data, int algorithm) { kQaSbpNmH
impl[algorithm-1].sort(data); Mc-)OtmG[
} 15$4&=O
P/JK$nb
public static interface Sort { l88A=iLgv
public void sort(int[] data); kD) $2I?
} }pa9%BQI
v`V7OD#:j]
public static void swap(int[] data, int i, int j) { l;sy0S"DO]
int temp = data; P]i =r] i
data = data[j]; V:/7f*n7
data[j] = temp; _SACqamo5s
} JlKM+UE:
} +,v-=~5