[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; WqAP'x 1
} SBA;p7^"
int i1=l; E#OKeMK
int i2=mid+1; @M-bE=
for(int cur=l;cur<=r;cur++){ _G42|lA$/
if(i1==mid+1) #PGExN3e
data[cur]=temp[i2++]; <?eZ9eB
else if(i2>r) $!t!=
data[cur]=temp[i1++]; =Ur/v'm
else if(temp[i1] data[cur]=temp[i1++]; ~W4<M:R
else va)\uXW.N
data[cur]=temp[i2++]; ~2H)#`\ac8
} Qw ED>G|
} ZtiOf}@i\
v,s]:9f`\>
} zKZ6Qjd8!
s_|wvOW)'
改进后的归并排序: {^v50d
(fl2?d5+C
package org.rut.util.algorithm.support; rmhB!Lo
Sc(2c.HO*
import org.rut.util.algorithm.SortUtil; mGX;JOjZ
KMv|;yXYj4
/** Xc.~6nYp
* @author treeroot ^,50]uX_
* @since 2006-2-2 uAJC Q)@
* @version 1.0 %u#pl=k}
*/ &c'unKH
public class ImprovedMergeSort implements SortUtil.Sort { -$*YN{D+
lVtgg?
private static final int THRESHOLD = 10; 6YN4]
Sx}h$E:
/* *E>YLkg]
* (non-Javadoc) !Bd2$y.
* /[mCK3_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !#3R<bW`R8
*/ *+iWB_
public void sort(int[] data) { 6Rso}hF}}
int[] temp=new int[data.length]; Jyn>:Yq(
mergeSort(data,temp,0,data.length-1); nHhg#wR
} kZ2+=/DYN
nWh?zf#{
private void mergeSort(int[] data, int[] temp, int l, int r) { Yq.Omr!
int i, j, k; tG6 o^
int mid = (l + r) / 2; M@.1P<:h
if (l == r) 5D'8 l@7
return; x;N?'"GP
if ((mid - l) >= THRESHOLD) N$.''D?7D
mergeSort(data, temp, l, mid); edch'H^2+P
else 3Vhm$y%Td
insertSort(data, l, mid - l + 1); joa$Y6
if ((r - mid) > THRESHOLD) h/X),aK3
mergeSort(data, temp, mid + 1, r); -y~JNDS1]
else }[1I_)
insertSort(data, mid + 1, r - mid); ,}bC
PR Y)hb;1
for (i = l; i <= mid; i++) { (2S,0MHk
temp = data; 5dhRuc
} F3?v&
for (j = 1; j <= r - mid; j++) { V&gUxS]*
temp[r - j + 1] = data[j + mid]; :Y"f.>
} Qv8Z64#
int a = temp[l]; &9'6hMu
int b = temp[r]; KzhldMJ^zq
for (i = l, j = r, k = l; k <= r; k++) { 4bmpMF-
if (a < b) { O,7P6
data[k] = temp[i++]; #<)u%)`
a = temp; EF}Z+7A
} else { \wMr[_LW
data[k] = temp[j--]; H>VuUH|
b = temp[j]; S\Q/ "Y
} g5H+2lSC
} M6?*\9E
} !X8:#a(
a7ZPV1k
/** kfn5y#6NZ
* @param data pbu8Ib8z
* @param l Z_S~#[\7^]
* @param i >RRb8=[J
*/ wAITE|H<zj
private void insertSort(int[] data, int start, int len) { B4I|"5G2y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J)66\h=
} C8i}~x<
} s`&8tP
} Lt_7pb%
} T*z >A
O||M |
堆排序： a(bgPkPP
@HR]b^2E
package org.rut.util.algorithm.support; \4mw>8wA
sz_|py?0
import org.rut.util.algorithm.SortUtil; 55fV\3F|R
e1K,4Bq
/** 8JGt|,
* @author treeroot .0nL;o
* @since 2006-2-2 R}BHRmSQ
* @version 1.0 =d`,W9D
*/ p9Ks=\yvL
public class HeapSort implements SortUtil.Sort{ :o=[Zp~B4d
C";F's)
/* (non-Javadoc) POdG1;)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5PG%)xff*
*/ fH>]>2fS
public void sort(int[] data) { HA>b'lqBM
MaxHeap h=new MaxHeap(); wR1M_&-s
h.init(data); (@mvNlc:
for(int i=0;i h.remove(); ?-Fp rC
System.arraycopy(h.queue,1,data,0,data.length); ^b'|`R+~}
} G!@tW`HO
R9~%ORI#;
private static class MaxHeap{ nxCwg>
rk{DrbRx
void init(int[] data){ 2?#IwT'
this.queue=new int[data.length+1]; nJlrBf_Kj
for(int i=0;i queue[++size]=data; rE EWCt
fixUp(size); pGh2 4E
} /wVrr%SN
} jCxw|tmgq
q@H?ohIH
private int size=0; nUD)G<v
d0eMDIm3R\
private int[] queue; IA!( 'Ks
7i,}F|#8
public int get() { sd xl@
return queue[1]; IZoa7S&t
} \5cAOBja
nxw]B"Eg
public void remove() { `A])4q$
SortUtil.swap(queue,1,size--); j!xt&t4D
fixDown(1); b&. o9PV"
} (pNA8i%=G
file://fixdown =EgiV<6vcH
private void fixDown(int k) { lt[{u$
int j; H0_hQ:K
while ((j = k << 1) <= size) { eo4;?z
if (j < size %26amp;%26amp; queue[j] j++; 1@im+R?a
if (queue[k]>queue[j]) file://不用交换 TIYI\/a\;
break; YD 1u
SortUtil.swap(queue,j,k); x/ lW=EQ
k = j; XzIhFX6
} _py%L+&{
} ;"Q{dOvp
private void fixUp(int k) { F_$eu-y
while (k > 1) { Tn8Z2iC
int j = k >> 1; 0ZlF#PJA
if (queue[j]>queue[k]) *2Il{KOA^
break; |MY6vRJ(
SortUtil.swap(queue,j,k); .n'z\]-/Q
k = j; 615, P/
} bzz=8n
} <H::{
!7]4sXL{
} % V/J6
]W-l1
} e?rp$kq7
nJ<h}*[
SortUtil： p(fYpD
S;[9 hI+
package org.rut.util.algorithm; dq?{?~3
T.]+T[}!
import org.rut.util.algorithm.support.BubbleSort; x|&A^hQ
import org.rut.util.algorithm.support.HeapSort; <E[X-S%&
import org.rut.util.algorithm.support.ImprovedMergeSort; epqX2`!V
import org.rut.util.algorithm.support.ImprovedQuickSort; s>~ h<B
import org.rut.util.algorithm.support.InsertSort; f$[6]7P
import org.rut.util.algorithm.support.MergeSort; yS%IE>?
import org.rut.util.algorithm.support.QuickSort; TL lR"L5
import org.rut.util.algorithm.support.SelectionSort; #8H
import org.rut.util.algorithm.support.ShellSort; o|FRG{TJ
J39,x=8LL
/** WLqwntzk
* @author treeroot 96x0'IsaG
* @since 2006-2-2 apPn>\O
* @version 1.0 c4E=qgP
*/ cD{I*t$
public class SortUtil { SRuNt3wW6
public final static int INSERT = 1; BR;f!
public final static int BUBBLE = 2; l$=Y(Xk
public final static int SELECTION = 3; n@r'b{2;l
public final static int SHELL = 4; Q5b~5a
public final static int QUICK = 5; F?TxViL
public final static int IMPROVED_QUICK = 6; q^ lx03
public final static int MERGE = 7; WB<_AIt+
public final static int IMPROVED_MERGE = 8; q|xJ)[AO
public final static int HEAP = 9; A6v<+`?
$)t ]av
public static void sort(int[] data) { {p@uH<)
sort(data, IMPROVED_QUICK); P]hS0,sE<(
} h)2W}p{a4=
private static String[] name={ dP}=cZ~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KAH9?zI)M
}; Op%}.9ed
H*BzwbM?
private static Sort[] impl=new Sort[]{ _7Z|=)
new InsertSort(), AC:cV='
new BubbleSort(), 7m3|2Qv
new SelectionSort(), T>,3V:X
new ShellSort(), d#6'dKV$
new QuickSort(), UT!gAU
new ImprovedQuickSort(), 5RD\XgyN]
new MergeSort(), $Kw)BnV
new ImprovedMergeSort(), 6fV%[.RR
new HeapSort() 9un* 1%
}; Ad!= *n
x@/ N9*
public static String toString(int algorithm){ h.+{cOA;n
return name[algorithm-1]; No#1Ikw
} ,5J-C!C
t ' _Au8
public static void sort(int[] data, int algorithm) { $J}d6%
impl[algorithm-1].sort(data); @y?<Kv}s
} &0! f_
z=C'qF`
public static interface Sort { WxwSb`U|
public void sort(int[] data); _EMq"\ND
} -v"\WmcS
F/GfEMSE
public static void swap(int[] data, int i, int j) { =8FV&|fP
int temp = data; "|<6bA
data = data[j]; {nTQc2T?;
data[j] = temp; Uv|z c
} VQA}!p
} |L|)r)t