[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; #`Et{6WS
} pQxi0/dp
int i1=l; qoD M!~
int i2=mid+1; ]| =#FFz
for(int cur=l;cur<=r;cur++){ _nnl+S>K
if(i1==mid+1) _bq2h%G=8
data[cur]=temp[i2++]; z3}4+~~
else if(i2>r) Y6@A@VJ
data[cur]=temp[i1++]; |7T!rnr
else if(temp[i1] data[cur]=temp[i1++]; ">RDa<H]
else P(r}<SM
data[cur]=temp[i2++]; \E<)B#
} *SZ*S%oS3
} QPa&kl
]pA}h.R#-
} #P6;-d@a
T+/Gz'
改进后的归并排序: -r82'3]
e{9(9qE"
package org.rut.util.algorithm.support; c~Hq.K$d
bsmnh_YRj
import org.rut.util.algorithm.SortUtil; =l3*{ ?G
oM-@B'TK
/** %lPFq-
* @author treeroot ,G,T&W
* @since 2006-2-2 :FdV$E]]<
* @version 1.0 (sn|`k3I
*/ Fx0<!_tY-
public class ImprovedMergeSort implements SortUtil.Sort { -OuMC&
Rf\>bI<.
private static final int THRESHOLD = 10; A! 1>
@ B3@M
/* |xaA3UA
* (non-Javadoc) o*QhoDjc
* +kl@`&ga
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U07n7`2w
*/ 5,qfr!hN,
public void sort(int[] data) { rC<m6
int[] temp=new int[data.length]; y#Ch /Jg?|
mergeSort(data,temp,0,data.length-1); gzHjD-g-<
} ~GS`@IU}
GYv2^IB:
private void mergeSort(int[] data, int[] temp, int l, int r) { Hj;j\R >2
int i, j, k; obX|8hTL%
int mid = (l + r) / 2; e$tKKcj0T
if (l == r) A0WQZt!FEN
return; `)H.TMI
if ((mid - l) >= THRESHOLD) \aT._'=M+
mergeSort(data, temp, l, mid); DjL(-7'p
else !cE)LG
insertSort(data, l, mid - l + 1); Mi'eViH
if ((r - mid) > THRESHOLD) r0j:ll d
mergeSort(data, temp, mid + 1, r); TiF$',WMv
else +V7*vlx-
insertSort(data, mid + 1, r - mid); ZT_EpT=1
R_4600
for (i = l; i <= mid; i++) { K#F~$k|1B
temp = data; zYSXG-k
} {q8V
for (j = 1; j <= r - mid; j++) { T?7ZF+yo6
temp[r - j + 1] = data[j + mid]; NRq jn; ,+
} 9[6*FAFJPP
int a = temp[l]; \kWceu}H,
int b = temp[r]; )n|:9hc
for (i = l, j = r, k = l; k <= r; k++) { w>VM--
if (a < b) { jPA?0h
data[k] = temp[i++]; GXRK+RHuBi
a = temp; r"U$udwjg
} else { 0Km{fZYq7;
data[k] = temp[j--]; xp>ra2A
b = temp[j]; se$GE:hC1Q
} HHoh//(\
} WGVvBX7#
} 0=(5C\w2
#xE"];
/** MF]s(7U4`
* @param data LfrS:g
* @param l 0$/wH#f
* @param i +<AX 0(
*/ *]O[ZjyOY
private void insertSort(int[] data, int start, int len) { aeE9dV~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !>;p^^e
} }r*t V)
} IM)\-O\Wd
} SukRJvi
} eH=lX9
;l5F il,3
堆排序： <q%buyQna
hU+sg~E
package org.rut.util.algorithm.support; f(7/
Y-@K@Zu]?
import org.rut.util.algorithm.SortUtil; K )1K ]
_~=X/I R
/** Qy5\qW'
* @author treeroot x:"_B
* @since 2006-2-2 @B*?owba>
* @version 1.0 =?0o5|u]
*/ QpAK]
public class HeapSort implements SortUtil.Sort{ *ukugg.
C B=H1+
/* (non-Javadoc) W!2(Ph*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pfe&wA't
*/ I/_`/mQ
public void sort(int[] data) { TJp(
MaxHeap h=new MaxHeap(); ,cYU
h.init(data); uRh`qnL
for(int i=0;i h.remove(); 'h.{fKG]ME
System.arraycopy(h.queue,1,data,0,data.length); j#9p0[
} 89U<9j
8 POrD8B
private static class MaxHeap{ [l:3F<M
+kd88Fx
void init(int[] data){ tb/bEy^
this.queue=new int[data.length+1]; 0:@:cz=#*
for(int i=0;i queue[++size]=data; IO/2iSbW
fixUp(size); e 9U\48
} \3hhM}6)DM
} "$;=8O5O
~*ZB2
private int size=0; Aj*0nV9_
nMNAn}~*M
private int[] queue; k 9R_27F
'{@hBB+ D
public int get() { |)}F}~&
return queue[1]; M6jP>fbV*
} /iQ}DbtRb
r3mB"("Z'
public void remove() { C=t:0.:PJ
SortUtil.swap(queue,1,size--); 3x#=@i
fixDown(1); DzkE*vR
} ZsirX~W<
file://fixdown vHZw{'5y
private void fixDown(int k) { MGCwT@P
int j; 72GXgah
while ((j = k << 1) <= size) { aEW Z*y
if (j < size %26amp;%26amp; queue[j] j++; 57'=Qz52
if (queue[k]>queue[j]) file://不用交换 .taJCE
break; mR,p?[P
SortUtil.swap(queue,j,k); 4d)w2t?H%
k = j; {6!Mf+Xq
} Uq 2Uv
} 4NMv7[r
private void fixUp(int k) { 5r.\maW
while (k > 1) { jJg9M'@2!
int j = k >> 1; D9B?9Qt2[
if (queue[j]>queue[k]) VHsuC$3W
break; E j@M\
SortUtil.swap(queue,j,k); T {a%:=`
k = j; f&bY=$iff
} LyhLPU0^q
} 8RbtI4
;TD<\1HJT=
} U5jY/e_
j_-$xz5-
} ;LELC5[*s
0I* ^VGZ
SortUtil： _|D8~\y
Zk$AAjC&
package org.rut.util.algorithm; @Ytsb!!
HdGAE1eU]}
import org.rut.util.algorithm.support.BubbleSort; ,miU'<8tQ|
import org.rut.util.algorithm.support.HeapSort; Nc F
import org.rut.util.algorithm.support.ImprovedMergeSort; t(VG#}
import org.rut.util.algorithm.support.ImprovedQuickSort; EMU~gwPR
import org.rut.util.algorithm.support.InsertSort; 7qt<CLJ
import org.rut.util.algorithm.support.MergeSort; =\e}fyuK
import org.rut.util.algorithm.support.QuickSort; @g(N!n~
import org.rut.util.algorithm.support.SelectionSort; Na=9ju
import org.rut.util.algorithm.support.ShellSort; wxB?}
(P~Jzp9u
/** ?/9]"HFHN
* @author treeroot {cnya*
* @since 2006-2-2 &<R8'
* @version 1.0 EShc1KPqc
*/ C_dsYuQ5R
public class SortUtil { aj51%wKMb:
public final static int INSERT = 1; IhwJYPLF
public final static int BUBBLE = 2; FVMR9~&+
public final static int SELECTION = 3; $TU=^W)X
public final static int SHELL = 4; l<<0:~+q
public final static int QUICK = 5; K~z*P0g*
public final static int IMPROVED_QUICK = 6; " E72j.
public final static int MERGE = 7; H"WkZX
public final static int IMPROVED_MERGE = 8; !I-+wc{ss
public final static int HEAP = 9; $"0t1
9m0`;~!
public static void sort(int[] data) { 25BW/23}e
sort(data, IMPROVED_QUICK); eW"i'\`0
} 7Gnslp?[U
private static String[] name={ T#6']D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e &^BPzg
}; xr&wV0O'
v:B_%-GfOA
private static Sort[] impl=new Sort[]{ jWLZ!a3+
new InsertSort(), @;qC% +^
new BubbleSort(), O_K@\<;~
new SelectionSort(), nQdNXv<(
new ShellSort(), 6[$kEKOY=
new QuickSort(), Ev0GAc1
new ImprovedQuickSort(), NLyvi,svS
new MergeSort(), yY_G;Wk
new ImprovedMergeSort(), a3?Dtoy'
new HeapSort() IJ!]1fXy+
}; /O|!Sg{
N?Mmv|
public static String toString(int algorithm){ E"!9WF(2t5
return name[algorithm-1]; pu=T pSZ
} 1)?^N`xF
c=I!?a"
public static void sort(int[] data, int algorithm) { ->n<9
impl[algorithm-1].sort(data); J9)wt ?%j
} 8xj4N%PA
AJ2Xq*fk
public static interface Sort { l<PGUm:_
public void sort(int[] data); [POcO
} ~^lQ[x
HQ7-,!XO
public static void swap(int[] data, int i, int j) { |~8\{IcZ
int temp = data; G\Hck=P[$3
data = data[j]; q?[{fcNh$
data[j] = temp; M$FXDyr
} MFX&+c
} [A|W0