[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 2`XG"[@
} u/5^N^@^
int i1=l; MY]Z@
int i2=mid+1; 'w^Md
for(int cur=l;cur<=r;cur++){ 0(2r"Hi
if(i1==mid+1) "w#jC~J<W
data[cur]=temp[i2++]; %QW1?VVP
else if(i2>r) D\}A{I92F4
data[cur]=temp[i1++]; 'gDhi!h%
else if(temp[i1] data[cur]=temp[i1++]; >}tm8|IHoo
else ^gY^I`"e6
data[cur]=temp[i2++]; kf3 u',}R
} Sz.sX w;
} Z=P]UD
MCBZq\c
} &R? \q*
KiXRBFo
改进后的归并排序: Z%]s+V)st
-RisZ-n*
package org.rut.util.algorithm.support; vhA4ol
z?NMQ8l|:6
import org.rut.util.algorithm.SortUtil; S${n:e0\
g%P6f
/** Sm@T/+uG:
* @author treeroot Qy>n]->%
* @since 2006-2-2 3ZZ"mlk*
* @version 1.0 hRU.^Fn#%
*/ I\%a<
public class ImprovedMergeSort implements SortUtil.Sort { bqmb|mD
;7jszs.6%
private static final int THRESHOLD = 10; #GTR}|Aga
6FYO5=R
/* FaNr}$Pe
* (non-Javadoc) {h<V^r
* Fj?gXc5{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,4O|{Iu#n
*/ I ,j,Hz0
public void sort(int[] data) { _"b[UT}m
int[] temp=new int[data.length]; q%g!TFMg
mergeSort(data,temp,0,data.length-1); Bu[sSoA
} "iu9r%l94
nY]5pOF:
private void mergeSort(int[] data, int[] temp, int l, int r) { %rU8^'Gu
int i, j, k; fi|k)
int mid = (l + r) / 2; ZDQc_{e{
if (l == r) <'{*6f@n
return; F$tshe(
if ((mid - l) >= THRESHOLD) Pdq}~um3{
mergeSort(data, temp, l, mid); |z1
else )=~OP>7B
insertSort(data, l, mid - l + 1); <_o).hE{
if ((r - mid) > THRESHOLD) z(00"ei
mergeSort(data, temp, mid + 1, r); |`N|S
else =tkO^
insertSort(data, mid + 1, r - mid); ';>]7oT`
-2o_ L?
for (i = l; i <= mid; i++) { ,QB]y|:
temp = data; 2LO8SJ#
} ? Zhnb0/
for (j = 1; j <= r - mid; j++) { z CS.P.$
temp[r - j + 1] = data[j + mid]; i[IOR0
} <5 ?
int a = temp[l]; _l{`lQ}
int b = temp[r]; 0*=[1tdWY
for (i = l, j = r, k = l; k <= r; k++) { AmyZ9r#{
if (a < b) { n+'gVEBA
data[k] = temp[i++]; e&R?9z-*
a = temp; R[qfG! "
} else { D1ep7ykY
data[k] = temp[j--]; o_i N(K
b = temp[j]; m }J@w~#
} EE{]EW(
} mqt$'_M
} DN$[rCi7
eBZ94rA]
/** uht>@ WSg|
* @param data :{g;J
* @param l ?@>PKUv{
* @param i )/p=ZH0[
*/ 85}S8\_u
private void insertSort(int[] data, int start, int len) { 1_=I\zx(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PxvD0GTW
} )8Q;u8jm1
} L2Vj2o"x?
} =$wQA
} 4#Bzq3,|
_w.H]`C!X
堆排序： )` ^/Dj;
6)h~9iK
package org.rut.util.algorithm.support; {0o,2]o!:
M(|6YF7u
import org.rut.util.algorithm.SortUtil; v;WfcpWq2
%7S{g
/** CZzgPId%x
* @author treeroot GzN /0:b
* @since 2006-2-2 <1pRAN0
* @version 1.0 SR$?pJh D%
*/ cHAq[Ebp2!
public class HeapSort implements SortUtil.Sort{ Oj F]K,$
W}iDT?Qi
/* (non-Javadoc) _, r6t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tJa*(%Z?f
*/ Jwtt&" c0.
public void sort(int[] data) { .5E6MF
MaxHeap h=new MaxHeap(); H?4t\pSS
h.init(data); wZsjbNf`K
for(int i=0;i h.remove(); uE ^uP@d
System.arraycopy(h.queue,1,data,0,data.length); K&{ruHoKB
} #ULzh&yO
-\[&<o@/D
private static class MaxHeap{ *G"}m/j-
G@4n]c_
void init(int[] data){ \!Wph5wA
this.queue=new int[data.length+1]; G Tz>}@W
for(int i=0;i queue[++size]=data; ,R7RXpP7t
fixUp(size); VfT@;B6ALF
} 6#;u6@+}yy
} ] ]lN[J
7Ml OBPh
private int size=0; p7p6~;P
APv& ^\oUH
private int[] queue; y(yBRR
;XI=Y"h{%
public int get() { D}/nE>*
return queue[1]; j-k]|0ea}
} KN:V:8:J
[N_)V kpr
public void remove() { >f:OU,"
SortUtil.swap(queue,1,size--); 'R nvQ""
fixDown(1); +wE>h>?;
} #^9a[ZLj0
file://fixdown z]R% A:6K
private void fixDown(int k) { v9GfudTZR
int j; i{}Q5iy
while ((j = k << 1) <= size) { +-PFISa<r
if (j < size %26amp;%26amp; queue[j] j++; Io4Ss1="
if (queue[k]>queue[j]) file://不用交换 M!O &\2Q
break; `C)|}qcC
SortUtil.swap(queue,j,k); X8 x:/]/0
k = j; 5iZ;7 ?(
} 4Ep6vm X
} )dF`L
private void fixUp(int k) { t|v_[Za}Z
while (k > 1) { Wo,fHY
int j = k >> 1; +|.6xC7U
if (queue[j]>queue[k]) i,mo0CSa
break; POb2U1Sj
SortUtil.swap(queue,j,k); 8M6Qn7{L
k = j; qR^i5JH}u
} %!V=noo
} T%@qlEmf
r^+n06[
} `m\l#r2C
FK,Jk04on
} SAUG+{Uq
f= 33+8I
SortUtil： s AlOX`t
;f~z_3g
package org.rut.util.algorithm; Wq/0}W.
$m0-IyXcv
import org.rut.util.algorithm.support.BubbleSort; Y@'ahxF
import org.rut.util.algorithm.support.HeapSort; E)%r}4u>
import org.rut.util.algorithm.support.ImprovedMergeSort; k^Uk=)9
import org.rut.util.algorithm.support.ImprovedQuickSort; FS6I?q#tQ
import org.rut.util.algorithm.support.InsertSort; 9I*i/fa
import org.rut.util.algorithm.support.MergeSort; -"w&g0Z
import org.rut.util.algorithm.support.QuickSort; 3R[,,WAj$
import org.rut.util.algorithm.support.SelectionSort; m*\XH DB
import org.rut.util.algorithm.support.ShellSort; <j^"=UN4#
m95;NT1N/g
/** W=?s-*F[~
* @author treeroot #brV{dHV,
* @since 2006-2-2 _|KeB(W
* @version 1.0 nISfRXU;
*/ q-nM]Gm
public class SortUtil { ARa9Ia{@
public final static int INSERT = 1; #{Gojg`5O
public final static int BUBBLE = 2; P:tl)ob
public final static int SELECTION = 3; I cz)Qtg|
public final static int SHELL = 4; Tp fC
public final static int QUICK = 5; ^]1M8R,
public final static int IMPROVED_QUICK = 6; =U<6TP]{
public final static int MERGE = 7; zoO9N oUHW
public final static int IMPROVED_MERGE = 8; 7s'r3}B`
public final static int HEAP = 9; t 4tXLI;'
'3V?M;3|K
public static void sort(int[] data) { ^fbw0
sort(data, IMPROVED_QUICK); 62z"cFN
} Q.`O;D}x
private static String[] name={ Q7@ m.w%`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eWwI@ASaA
}; Tq=OYJq5U
o 2sOf
private static Sort[] impl=new Sort[]{ w`F4.e
new InsertSort(), L?p,Sy<RI
new BubbleSort(), ,T3_*:0hk!
new SelectionSort(), vW:XM0
new ShellSort(), }Qo:;&"3
new QuickSort(), +x"cWOg
new ImprovedQuickSort(), tr$~INe
new MergeSort(), Uq}-<q
new ImprovedMergeSort(), +:fr(s!OE
new HeapSort() VvTs87
}; 3gzcpFNqX
h(VF
public static String toString(int algorithm){ fb||q-E
return name[algorithm-1]; B)cVbjTn
} msiftP.
LVX01ox$
public static void sort(int[] data, int algorithm) { 1Ev#[FOc
impl[algorithm-1].sort(data); =7WE
} 47 _";g@X
4 9zOhG |
public static interface Sort { (o5+9'y"9
public void sort(int[] data); y8.(filNB
} ^7l^/GSO
(ON_(MN
public static void swap(int[] data, int i, int j) { G~\ SI.
int temp = data; ,`lVB#|
data = data[j]; `*nK@:
data[j] = temp; ?NL>xMA
} #FfUkV
} d\{#*{_A