[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; ;0\
} `L}Irt}
int i1=l; [k6 5i
int i2=mid+1; X?.LA7)CK
for(int cur=l;cur<=r;cur++){ [PW*|U
if(i1==mid+1) NvlG@^&S
data[cur]=temp[i2++]; *YY:JLe
else if(i2>r) #9Dixsl*Q
data[cur]=temp[i1++]; "Mmvf'N
else if(temp[i1] data[cur]=temp[i1++]; l4Y}<j\;
else g8w5X!Z
data[cur]=temp[i2++]; zc-.W2"Hu
} >?A3;O]
} 9Q%Fel.
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} EGyQhZ mO
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改进后的归并排序: 6*2z^P9FRj
. RNQlh3
package org.rut.util.algorithm.support; nPUq+cXy]C
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import org.rut.util.algorithm.SortUtil; 52#@.Qa
!Hr +|HKQ?
/** X/nb7_M
* @author treeroot u37@9
* @since 2006-2-2 {N$G|bm]u<
* @version 1.0 ]E)gMf
*/ ,*V{gpC7
public class ImprovedMergeSort implements SortUtil.Sort { N*My2t_+E
D|n`9yv a
private static final int THRESHOLD = 10; ZUMzWK5Th
&`63"^y
/* ~>ACMO
* (non-Javadoc) 8<uKzb(O:
* {j E}mzi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Tzh3,F2
*/ BfF$
public void sort(int[] data) { W%.Kr-[?`o
int[] temp=new int[data.length]; 8\t~*@"
mergeSort(data,temp,0,data.length-1); D{/GjFO
} C sn"sf
#2&_WM!
private void mergeSort(int[] data, int[] temp, int l, int r) { V4Ql6vg_f
int i, j, k; mg*[,_3q33
int mid = (l + r) / 2; /'p(X~X:l
if (l == r) :NO'[iE
return; &}%3yrU
if ((mid - l) >= THRESHOLD) ; eq^m,oz
mergeSort(data, temp, l, mid); ;Zc(qA
else (J~n|hA2/D
insertSort(data, l, mid - l + 1); Jpws1~
if ((r - mid) > THRESHOLD) {v56k8uZ
mergeSort(data, temp, mid + 1, r); 2bfKD'!aH
else .QzHHW4&0
insertSort(data, mid + 1, r - mid); V\WqA8
N'!a{rF
for (i = l; i <= mid; i++) { hO@'WoniW
temp = data; <`b)56v:+
} /e6\F7
for (j = 1; j <= r - mid; j++) { 9dr\=e6) C
temp[r - j + 1] = data[j + mid]; x(&o=Pu
} '$PiyM|V
int a = temp[l]; ; 7[5%xM
int b = temp[r]; ;+`t[ go
for (i = l, j = r, k = l; k <= r; k++) { ">*PH}b
if (a < b) { \L(~50{(
data[k] = temp[i++]; [&y{z-D>
a = temp; B3]q*ERAo
} else { ~%B^`s
data[k] = temp[j--]; `[w:l[i
b = temp[j]; ne4hR]:
} yNP M-
} lzN\~5a}
} f3]Z22Yq
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/** %vDN{%h8
* @param data {A2(a7vV
* @param l %,E\8{I+
* @param i (V)nHF*<>
*/ r'#5ncB
private void insertSort(int[] data, int start, int len) { YN#i^(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <<W{nSm#
} ^+^#KC8]W
} SZW`|ajH
} LWuciHfd+
} }eetx68\
:[|4Zn
堆排序： fwK5p?Xhm
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package org.rut.util.algorithm.support; \wEHYz
\C $LjSS-
import org.rut.util.algorithm.SortUtil; ABw:SQ6=Q
tAO,s ZW
/** HjAhz
* @author treeroot S<H2e{~
* @since 2006-2-2 @&p:J0hbp
* @version 1.0 1t wC-rC
*/ L_3Ao'SA
public class HeapSort implements SortUtil.Sort{ 5gYv CW&~
#m=TK7*v
/* (non-Javadoc) lKWe=xY\B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MwbXZb{#"=
*/ viB'ul7o
public void sort(int[] data) { *;cvG?V
MaxHeap h=new MaxHeap(); $p:RnH\H1
h.init(data); R8LJC]6Bh
for(int i=0;i h.remove(); #t N9#w[K{
System.arraycopy(h.queue,1,data,0,data.length); (iQ< [3C=
} D$@5$./
vZMb/}-o
private static class MaxHeap{ mq 0d ea
uH*moVw@5
void init(int[] data){ K#Ia19au5
this.queue=new int[data.length+1]; O|%03q(
for(int i=0;i queue[++size]=data; dRj2%Q f
fixUp(size); O0^m_
} %8Eu{3
} ]R%[cr
FZL"[3
private int size=0; 6Qtyv
3.?G,%S5.$
private int[] queue; ;]v{3m
de7 \~$
public int get() { U]/iPG&_
return queue[1]; hTfq>jIB_
} Q1kZ+b&
Fnqj^5
public void remove() { e={ ?d6
SortUtil.swap(queue,1,size--); aSse' C<a
fixDown(1); |L9p.q
} RE._Ov>
file://fixdown &{4KymB:
private void fixDown(int k) { c,>y1%V*S{
int j; ":v^Y 9
while ((j = k << 1) <= size) { C#qF&n
if (j < size %26amp;%26amp; queue[j] j++; 6JgbJbUi
if (queue[k]>queue[j]) file://不用交换 xAwP
break; SfSWjq
SortUtil.swap(queue,j,k); hTc :'vq
k = j; E!A+J63zsw
} f;D(X/"f]
} o[I s$j
private void fixUp(int k) { ]ZR}Pm/CA
while (k > 1) { E]w2 {%
int j = k >> 1; `}:pUf
if (queue[j]>queue[k]) mX/'Fta
break; zK_Q^M`
SortUtil.swap(queue,j,k); 9y'To JZ6
k = j; Sq]VtQ(
} %OJ"@6A
} '}l7=r
~@#s<a,%;
} kfY. 9$(d
bg\9Lbjr
} &8;Fi2}(L
3mQ3mV:
SortUtil： }wB!Bx2
&E]<KbVx
package org.rut.util.algorithm; yi8AzUW cW
RD6>\9
import org.rut.util.algorithm.support.BubbleSort; 4`Cgz#v {
import org.rut.util.algorithm.support.HeapSort; 18^K!:Of
import org.rut.util.algorithm.support.ImprovedMergeSort; dUQ)&Hv
import org.rut.util.algorithm.support.ImprovedQuickSort; ),>whCtsI
import org.rut.util.algorithm.support.InsertSort; /2Z7
import org.rut.util.algorithm.support.MergeSort; SJ}PV:x
import org.rut.util.algorithm.support.QuickSort; tUksIUYD\
import org.rut.util.algorithm.support.SelectionSort; R5i xG9
import org.rut.util.algorithm.support.ShellSort; _Tf %<E
ki'<qa
/** >]HvXEdNZ|
* @author treeroot %CZGV7JdA
* @since 2006-2-2 vA{DF{S4
* @version 1.0 ;Kh[6{W
*/ 4j}.=u*X7
public class SortUtil { \j<aFOT(
public final static int INSERT = 1; TyvUdU
public final static int BUBBLE = 2; _}gfec4o
public final static int SELECTION = 3; SBaTbY0
public final static int SHELL = 4; B1j^qoC.5
public final static int QUICK = 5; 2uT@jfj:r
public final static int IMPROVED_QUICK = 6; BI<(]`FP;s
public final static int MERGE = 7; ^?: Az
public final static int IMPROVED_MERGE = 8; I* PxQ
public final static int HEAP = 9; - i{1h"
/!_FE+
public static void sort(int[] data) { BC85#sbl
sort(data, IMPROVED_QUICK); sZwa#CQKq
} 9&HaEAme
private static String[] name={ 'JO}6 ;W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S"fqE%
}; gk}.LE
<vzU}JA\
private static Sort[] impl=new Sort[]{ l$!Z};mw0E
new InsertSort(), Odm1;\=Eg+
new BubbleSort(), K#N5S]2yb
new SelectionSort(), s]HJcgI
new ShellSort(), DB'3h7T
new QuickSort(), ZHwN3
new ImprovedQuickSort(), 2fayQY xD
new MergeSort(), W#d'SL#5
new ImprovedMergeSort(), u6E ze4u
new HeapSort() -hF!_);{
}; dhg($m
(0_]=r=q
public static String toString(int algorithm){ V LeYO5'L
return name[algorithm-1]; a~VW?wq
} w4^$@GtN
Pr1OQbg]8
public static void sort(int[] data, int algorithm) { BD.l5~:
impl[algorithm-1].sort(data); /a$Zzs&xs
} 0aGauG[
-e51/lhpd
public static interface Sort { $Zi{1w
public void sort(int[] data); P$O@G$n
} %0u5d$bq
!t)uRJ
public static void swap(int[] data, int i, int j) { Nb0T3\3W
int temp = data; 'L1yFv
data = data[j]; :E|+[}|
data[j] = temp; ]]u_Mdk
} L]X Lv9J0
} )>rYp )