[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; zKutx6=aj
} K%k,-
int i1=l; yh)q96m-V=
int i2=mid+1; :h3JDQe:.
for(int cur=l;cur<=r;cur++){ L!G3u/
if(i1==mid+1) ')aYkO{%sb
data[cur]=temp[i2++]; c9[5)
else if(i2>r) TGLXvP& \
data[cur]=temp[i1++]; 5eLPn
else if(temp[i1] data[cur]=temp[i1++]; L; ~=(
else 0#7dm9
data[cur]=temp[i2++]; 8xX{y#
} vKC>t95
} h CiblM
hMQaT-v
} t]ZSo-
0{yx*}.
改进后的归并排序: R[c_L=
m+=!Z|K
package org.rut.util.algorithm.support; iiTUhO )
I}WJ0}R
import org.rut.util.algorithm.SortUtil; #o RUH8
P33E\O
/** y)}aySQK^
* @author treeroot Ydx5kUJV<
* @since 2006-2-2 bqO"k t
* @version 1.0 !iw 'tHhR
*/ SXEiyy[7v
public class ImprovedMergeSort implements SortUtil.Sort { dq(x@&J
||V:',#,W
private static final int THRESHOLD = 10; kXr%73s
1N+#(<x@,
/* [XXN0+ /
* (non-Javadoc) Tt\w^Gv\d
* : [y(<TLw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4_<Uk
*/ ho1F8TG=
public void sort(int[] data) { Ub,unU
int[] temp=new int[data.length]; L ~w=O!
mergeSort(data,temp,0,data.length-1); +$t%L
} lND[anB!
^&iV%vQ[
private void mergeSort(int[] data, int[] temp, int l, int r) { &iZYBa
int i, j, k; +QX>:z
int mid = (l + r) / 2; ^v-'=1ub?
if (l == r) 37xxVbik
return; TeJ `sJ
if ((mid - l) >= THRESHOLD) UsN b&aue
mergeSort(data, temp, l, mid); R6;>RRU_
else jhv1 D'>6
insertSort(data, l, mid - l + 1); fXe-U='
if ((r - mid) > THRESHOLD) gQWX<
mergeSort(data, temp, mid + 1, r); s?k[_|)!
else T;@>O^
insertSort(data, mid + 1, r - mid); LltguNM$
AvZ)1(
for (i = l; i <= mid; i++) { N_D+d4@
temp = data; |`wsKr'
} <q2nZI^
for (j = 1; j <= r - mid; j++) { _eV n#!|
temp[r - j + 1] = data[j + mid]; vc#oALc&
} -G#k/Rz6
int a = temp[l]; "Q{~Bj~
int b = temp[r]; ?bAFYF0!I
for (i = l, j = r, k = l; k <= r; k++) { S7{.liHf
if (a < b) { bK\WdG\;
data[k] = temp[i++]; Y&+_p$13
a = temp; l-}5@D[
} else { ;bZ*6-\!-
data[k] = temp[j--]; mo[<4Uks
b = temp[j]; ]31XX=
} /;6@M=6u
} [P=[hj;
} S.|kg2
FK# E7 K
/** Cfo 8gX*
* @param data $'YKB8C
* @param l ++DQS9b{
* @param i 'h>5&=r
*/ P<!$A
private void insertSort(int[] data, int start, int len) { T% 13 '
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e~.?:7t
} nDB 2>J
} &v5.;8u+OV
} -{U>} Y)
} .#55u+d,
=yX&p:-&
堆排序： \UqS -j|
?4[Oh/]R
package org.rut.util.algorithm.support; lkH;N<U
aT:AxYn8
import org.rut.util.algorithm.SortUtil; %=9yzIjbAt
<o!&Kk9
/** cPsn]U
* @author treeroot ?koxt44
* @since 2006-2-2 !Nl.Vb
* @version 1.0 BCUt`;q ]B
*/ 51G=RYay9
public class HeapSort implements SortUtil.Sort{ 4 %)N(%u
\DU^idp#
/* (non-Javadoc) Z%5nVsm:G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gFs/012{
*/ ur<eew@8@i
public void sort(int[] data) { /8>0;bX+
MaxHeap h=new MaxHeap(); poQdI?ed,
h.init(data); 9Ue7 ~"=
for(int i=0;i h.remove(); jc&/}o$K
System.arraycopy(h.queue,1,data,0,data.length); juMxl
} Bhu@2KdA
)nNCB=YF!
private static class MaxHeap{ '9 e\.
inPE/Ux
void init(int[] data){ (7;J"2M
this.queue=new int[data.length+1]; O~h94 B`
for(int i=0;i queue[++size]=data; Ln=>@
fixUp(size); NSS4vtA
} z$c&=Q
} jF2[bzY4
}F{C= l2
private int size=0; f2 ydL/M,
qE0FgqRB
private int[] queue; ?""\
CZJHE>
public int get() { [A"H/Qztk
return queue[1]; =t3vbV
} QB/7/PW{H\
8 "_Bq
public void remove() { _Z+jQFKJ\8
SortUtil.swap(queue,1,size--); ADYx.8M|9i
fixDown(1); ovd^,?ib
} D3S+LV
file://fixdown |66m` <
private void fixDown(int k) { 731h ~x!u
int j; cBifZv*l
while ((j = k << 1) <= size) { F0&~ ?2nG
if (j < size %26amp;%26amp; queue[j] j++; R}DX(T,K
if (queue[k]>queue[j]) file://不用交换 0)d?Y
break; sDLS*467
SortUtil.swap(queue,j,k); ':l"mkd+`
k = j; 7qP4B9S
} Fn:.Y8%-
} rDVgk6
private void fixUp(int k) { g/IH|Z=A
while (k > 1) { 5<89Af&&K8
int j = k >> 1; jHAWK9fa
if (queue[j]>queue[k]) @Ex;9F,Q
break; gyi)T?uS)
SortUtil.swap(queue,j,k); w`L~#yu
k = j; %p0b{P j_p
} i?F[||O"$
} 7p)N_cJD
|d $1wr
} sFLcOPj-%
}0QN[$H!
} RcgRaQ2^
BwC<rOU
SortUtil： !w q4EV
&yE1U#J(
package org.rut.util.algorithm; ql^g~b
np\st7&f6
import org.rut.util.algorithm.support.BubbleSort; R'zu"I
import org.rut.util.algorithm.support.HeapSort; >;)2NrJV
import org.rut.util.algorithm.support.ImprovedMergeSort; oEJaH
import org.rut.util.algorithm.support.ImprovedQuickSort; #(6) ^ (
import org.rut.util.algorithm.support.InsertSort; k({2yc#RD&
import org.rut.util.algorithm.support.MergeSort; -yoAxPDW
import org.rut.util.algorithm.support.QuickSort; V1<ow'^i
import org.rut.util.algorithm.support.SelectionSort; YMT8p\#rp
import org.rut.util.algorithm.support.ShellSort; CWs: l3_yn
*C\(wL
/** 6O9iEc,HM
* @author treeroot Z!=L
* @since 2006-2-2 9`B0fv Q&
* @version 1.0 ~\$=w10
*/ /|GT\X4o
public class SortUtil { :r&iMb:Ra
public final static int INSERT = 1; jyiFM5&
public final static int BUBBLE = 2; *(G&B\
public final static int SELECTION = 3; Vo,[EVL
public final static int SHELL = 4; 3cqQL!Gm
public final static int QUICK = 5; 7R,qDp S
public final static int IMPROVED_QUICK = 6; NPm;
public final static int MERGE = 7; Q"%S~&#'
public final static int IMPROVED_MERGE = 8; IU|kNBo
public final static int HEAP = 9; %zzYleJ!]
+3;Ody"59
public static void sort(int[] data) { :\b|dvI<
sort(data, IMPROVED_QUICK); x? N.WABr;
} l&L,7BX
private static String[] name={ .k@^KY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U&P{?>{u
}; BX[~%iE
J!hFN]M<<
private static Sort[] impl=new Sort[]{ gO='A(Y
new InsertSort(), ZQAO"huk]
new BubbleSort(), t<638`{kk
new SelectionSort(), ZIpD{>/
new ShellSort(), @TzvT3\q
new QuickSort(), ;~+]! U
new ImprovedQuickSort(), r|GY]9
new MergeSort(), M-J<n>hl
new ImprovedMergeSort(), j13DJ.xu
new HeapSort() *%!M4&
}; {\G`]r-cM
f+x;:
public static String toString(int algorithm){ B+] D5K
return name[algorithm-1]; =dzWmL<~8
} /=)L_
`G!M>h@
public static void sort(int[] data, int algorithm) { ~y /!fnv
impl[algorithm-1].sort(data); KjYAdia:H
} Gb2L }
*k [J6
public static interface Sort { j1*f]va
public void sort(int[] data); HYCuK48F[_
} %}3qR~;
bgF^(T35
public static void swap(int[] data, int i, int j) { ]$A(9Pn"
int temp = data; (R*j|HAw`X
data = data[j]; .Z\Q4x#!Z
data[j] = temp; T2FE+A]n9
} 6N~q`;p0
} Kj3?ve~