[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; [l<&eI&ln
} A2P.5EN
int i1=l; 1jPh0?BY
int i2=mid+1; 2)QZYgfh
for(int cur=l;cur<=r;cur++){ 5rQu^6&
if(i1==mid+1) .O&YdUo
data[cur]=temp[i2++]; #hXvGon$?
else if(i2>r) $uRi/%Q9
data[cur]=temp[i1++]; 0&tr3!h\
else if(temp[i1] data[cur]=temp[i1++]; yDRi
else ^B7Ls{
data[cur]=temp[i2++]; =OTu8_ d0t
} MvaX>n!o
} >m%7dU
\uJ+~db=
} Fp]ErDan
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改进后的归并排序: GR 1%(,
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package org.rut.util.algorithm.support; Y'+KU/H
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import org.rut.util.algorithm.SortUtil; E7/i_Xkk
rA8{Q.L
/** xjrL@LO#
* @author treeroot 1/?K/gL
* @since 2006-2-2 rcH{"\F_/
* @version 1.0 >>8{N)c5E
*/ ?<Mx*l
public class ImprovedMergeSort implements SortUtil.Sort { QDb8W*&<
?_T[]I'
private static final int THRESHOLD = 10; g+?2@L$L
g{kjd2
/* 7fl{<uf
* (non-Javadoc) s={IKU&m[
* p+7#`iICE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4|4[3Ye7u:
*/ WB `h)
public void sort(int[] data) { zp``e;gY
int[] temp=new int[data.length]; vM:c70=
mergeSort(data,temp,0,data.length-1); N]\)Ok
} r!|h3*YA
gplrJaH@
private void mergeSort(int[] data, int[] temp, int l, int r) { i#*lK7
int i, j, k; 7[0CVWs,
int mid = (l + r) / 2; nXjSf
if (l == r) }n"gX>e~
return; -uhVw_qq#
if ((mid - l) >= THRESHOLD) .VohW=D3
mergeSort(data, temp, l, mid); >Dz8+y
else =hI;5KF
insertSort(data, l, mid - l + 1); TS=U%)Ik
if ((r - mid) > THRESHOLD) ;sx4w!Y,
mergeSort(data, temp, mid + 1, r); 7E5=Qx
else \i<7Lk
insertSort(data, mid + 1, r - mid); v(, tu/
R+.kwq3CED
for (i = l; i <= mid; i++) { vw-y:,5`t8
temp = data; h&~9?B
} x]4>f[>*>
for (j = 1; j <= r - mid; j++) { 6(ER$
temp[r - j + 1] = data[j + mid]; k(@W z>aCv
} '#Do( U'
int a = temp[l]; J\J3'u
int b = temp[r]; P=s3&NDD
for (i = l, j = r, k = l; k <= r; k++) { 4`Jf_C
if (a < b) { ]8<`&~a
data[k] = temp[i++]; ZQ-6n1O
a = temp; mSO7r F
} else { sG^{ cn
data[k] = temp[j--]; C@pn4[jTl
b = temp[j]; OXB 5W#$
} *R7bI?ow
} d vo|9>
} lB!M;2^)X
gQ<{NQMzvd
/** oqg +<m
* @param data ,v?FR }v
* @param l d\8j!F^=
* @param i TFzk5
*/ ~c*kS E2X
private void insertSort(int[] data, int start, int len) { T#vY(d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V`1x![\
} 6l2Os $
} u}rJqZ
} NH*"AE;
} ;3%Y@FS@
UVW4KUxR
堆排序： vjA!+_I6
@twi<U_
package org.rut.util.algorithm.support; r>sXvzv
\c!e_rZ
import org.rut.util.algorithm.SortUtil; |C0!mU
:Smyk.B2!
/** Q9;VSF)
* @author treeroot C]h_co2eI
* @since 2006-2-2 f>&*%[fw
* @version 1.0 _@g\.7@0G
*/ Q:'r p
public class HeapSort implements SortUtil.Sort{ ,?+uQXfXR
+I}!)$/
/* (non-Javadoc) 0sCWIGUW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }j!C+i
*/ /)?qD
public void sort(int[] data) { ?D(aky#cyc
MaxHeap h=new MaxHeap(); %MCS_'N J
h.init(data); voJJoy%
for(int i=0;i h.remove(); 7I;0%sVQ{
System.arraycopy(h.queue,1,data,0,data.length); O[p c$Pi
} BA8!NR|
=F5zU5`i
private static class MaxHeap{ Tr;&bX5]H
7g%\+%F I
void init(int[] data){ '?LqVzZI
this.queue=new int[data.length+1]; -<e_^
for(int i=0;i queue[++size]=data; /"^XrVi-
fixUp(size); +k0UVZZX?
} ?30pNF|
} h${=gSJc
_SH~.Mt_!
private int size=0; 7h>,
[@]i_L[
private int[] queue; L=WKqRa>4
>X5RRSo
public int get() { Kk|)N3AV:
return queue[1]; "I@akM$x
} -KZ9TV # R
;wZplVB7y
public void remove() { :b!&Xw$
SortUtil.swap(queue,1,size--); l%qh^0
fixDown(1); by$mD_sr
} M-e|$'4u
file://fixdown Z4m+GFY
private void fixDown(int k) { =c%gV]>G
int j; FV/lBWiQQ
while ((j = k << 1) <= size) { _<l)4A3rS
if (j < size %26amp;%26amp; queue[j] j++; o WAy[
if (queue[k]>queue[j]) file://不用交换 FtDF}
break; Ri*mu*r\}
SortUtil.swap(queue,j,k); =Ew77
k = j; n;QFy5HB8
} Jyp7+M]
} p[;@9!t
private void fixUp(int k) { 8~O0P=
while (k > 1) { J~h9i=4<bF
int j = k >> 1; O5:[]vIn
if (queue[j]>queue[k]) A+z}z@K
break; 1DN
SortUtil.swap(queue,j,k); jLw|F-v-l<
k = j; G-#rWZ&
} Dv4H^
} -a'D~EGB^
Lzx/9PPYn
} N9u {)u
.k%/JF91n
} m;qqjzy
};f^*KZ=0
SortUtil： R'oGsaPB2
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package org.rut.util.algorithm; klTRuU(
*o<|^,R
import org.rut.util.algorithm.support.BubbleSort; n8FIxl&u
import org.rut.util.algorithm.support.HeapSort; &egP3
import org.rut.util.algorithm.support.ImprovedMergeSort; *|gl1S
import org.rut.util.algorithm.support.ImprovedQuickSort; H;+98AIy`
import org.rut.util.algorithm.support.InsertSort; bP%X^q~]A
import org.rut.util.algorithm.support.MergeSort; lXD=uRCI
import org.rut.util.algorithm.support.QuickSort; S$a.8Xh
import org.rut.util.algorithm.support.SelectionSort; 4~hP25q
import org.rut.util.algorithm.support.ShellSort; +;bZ(_ohG
}|j#C[
/** Dw,LB>Eq,
* @author treeroot kZfj"+p_S
* @since 2006-2-2 3(:?Z-iKe
* @version 1.0 J8[aVG
*/ >;}(?+|f
public class SortUtil { \vuWypo
public final static int INSERT = 1; (aB:P03
public final static int BUBBLE = 2; f*^bV_
public final static int SELECTION = 3; xFA`sAucr
public final static int SHELL = 4; `6PBV+]Vm3
public final static int QUICK = 5; Z5`V\$
public final static int IMPROVED_QUICK = 6; c]|Tg9AW
public final static int MERGE = 7; g9IIC5
public final static int IMPROVED_MERGE = 8; fr8';Jm
public final static int HEAP = 9; OfeM;)
rY$wC%
public static void sort(int[] data) { <t"fL RX
sort(data, IMPROVED_QUICK); .73sY5hdTN
} Q_*.1L
private static String[] name={ x$pz(Q&v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u=0161g
}; V-"#Kf9
-.Zy(
private static Sort[] impl=new Sort[]{ !HXyvyDN
new InsertSort(), +u lxCm_lV
new BubbleSort(), F'ez{B\AX
new SelectionSort(), BiZYGq
new ShellSort(), +KIBbXF7
new QuickSort(), D<[kbt5^7
new ImprovedQuickSort(), .4y44: T
new MergeSort(), \8k4v#wH
new ImprovedMergeSort(), Q{~;4+ZD
new HeapSort() X#X/P
}; kAW2vh
semTAoqH
public static String toString(int algorithm){ V! .I>
return name[algorithm-1]; K'[kl'
} s2#}@b6'.
|w>d]eA5
public static void sort(int[] data, int algorithm) { &7eN EA
impl[algorithm-1].sort(data); GMpg+rK
} "a<:fEsSE
^Jc|d,u;s
public static interface Sort { ( ;KTV*1
public void sort(int[] data); /5Yl, P
} pQ8f$I#v
Krr51`hZH
public static void swap(int[] data, int i, int j) { O44Fj)
int temp = data; )0=H)k0
data = data[j]; ]oKHS$W9
data[j] = temp; ];u nR<H
} ) LohB,?
} Q@Cy\l