[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; T)\}V#iA*
} N:<$]x>
int i1=l; '5BD%#[
int i2=mid+1; 3J#LxYK
for(int cur=l;cur<=r;cur++){ i<"lXu
if(i1==mid+1) 1,wcf,
data[cur]=temp[i2++]; ddfGR/1X
else if(i2>r) @ b!]Jw
data[cur]=temp[i1++]; .yj@hpJM
else if(temp[i1] data[cur]=temp[i1++]; @wR3L:@
else *6/IO&y1a
data[cur]=temp[i2++]; ab2FK
} ]bY|>q
} GOc
MT-Tt
} Zk=,`sBC
iwK.*07+
改进后的归并排序: duG3-E
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package org.rut.util.algorithm.support; qPQIcJ
lp *GJP]T
import org.rut.util.algorithm.SortUtil; qdix@@
c<_%KL&R
/** CVfV
* @author treeroot e34>q:#5l
* @since 2006-2-2 :0r,.)
* @version 1.0 zKd@Ab
*/ sUG!dwqqd
public class ImprovedMergeSort implements SortUtil.Sort { 3(WijtH
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private static final int THRESHOLD = 10; eN=jWUoCh
{XOl &
/* i1B!oZ3q
* (non-Javadoc) |`LH|6/
* j$)ogGu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sLr47 NC
*/ Ek L2nI
public void sort(int[] data) { u_k[<&$
int[] temp=new int[data.length]; iJzBd7
mergeSort(data,temp,0,data.length-1); WWunS|B!
} ab6I*DbF
[J,.?'V
private void mergeSort(int[] data, int[] temp, int l, int r) { no*)M7
int i, j, k; ~&<#H+O
int mid = (l + r) / 2; 4CM'I~
if (l == r) >&(#p@#
return; )pHtsd.eP
if ((mid - l) >= THRESHOLD) 1{a%V$S[
mergeSort(data, temp, l, mid); 4qid+ [B
else Wlc&QOfF
insertSort(data, l, mid - l + 1); <w9~T TS
if ((r - mid) > THRESHOLD) cXb*d|-|N
mergeSort(data, temp, mid + 1, r); o!tC{"g
else K?uZIDo
insertSort(data, mid + 1, r - mid); +x2JC' -H
CYaN;HV@_
for (i = l; i <= mid; i++) { 7X>IS#W]
temp = data; "/'3I/}
} (7R?T}
for (j = 1; j <= r - mid; j++) { y#GHmHeh
temp[r - j + 1] = data[j + mid]; Cy;UyZ
} q}LDFsU
int a = temp[l]; lbHgxZ
int b = temp[r]; dbby.%
for (i = l, j = r, k = l; k <= r; k++) { T-] {gc
if (a < b) { ?Lg(,-:
data[k] = temp[i++]; KwL_ae6fV
a = temp; :F:1(FDP
} else { h1_Z&VJ
data[k] = temp[j--]; *z~,|DQ(A
b = temp[j]; Cab.a)o
} \BnU?z
} :c/54Ss~
} uBlPwb,V
(Q8!5s
/** jYp!?%!
* @param data ?%6oM
* @param l 4zyQ"?A~
* @param i 1iF=~@Nz_
*/ Pe_O(
private void insertSort(int[] data, int start, int len) { "Vp nr +6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9B0ON*`
} .!o]oM U/
} N68mvBe
} ng%[yY
} p>tkRA?lk
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堆排序： -#ZLu.
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package org.rut.util.algorithm.support; pAy4%|(
=z'(FP5!0
import org.rut.util.algorithm.SortUtil; c""&He4zp
mh3S?Uc
/** \bARp z?a
* @author treeroot jrQ0-D%M d
* @since 2006-2-2 FOk&z!xYKd
* @version 1.0 Z}S[fN8
*/ #^T`vTD-
public class HeapSort implements SortUtil.Sort{ z=>fBb>w7
d,^O[9UWo
/* (non-Javadoc) !UoA6C:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c>LP}PGk
*/ &>\;4E.O5
public void sort(int[] data) { *V2;ds.~
MaxHeap h=new MaxHeap(); l2Sar1~1
h.init(data); +?*;#=q
for(int i=0;i h.remove(); 'ZF6Z9
System.arraycopy(h.queue,1,data,0,data.length); LzU'6ah';5
} !yd B,S
ce;7
private static class MaxHeap{ M/W"M9u
o|@0.H|
void init(int[] data){ =o9s?vOJ
this.queue=new int[data.length+1]; s;vt2>;q+e
for(int i=0;i queue[++size]=data; 7p1Y g
fixUp(size); u}%OC43
} aGbG@c8PRi
} 5SY%B#;5G
bWo
private int size=0; M_E,pg=rWI
3'z$@;Ev+
private int[] queue; 7ui<2(W@0
7fR5V
public int get() { HA0!>_I dC
return queue[1]; :Qge1/
} FOG{dio
x$d[Ovw-
public void remove() { h?xgOb!4
SortUtil.swap(queue,1,size--); ({E,}x
fixDown(1); u !BU^@P
} }k }=e
file://fixdown 6BV 6<PHJ
private void fixDown(int k) { g4ZUh@b~
int j; #|sE]\bsH
while ((j = k << 1) <= size) { Lp&nO
if (j < size %26amp;%26amp; queue[j] j++; =2 HY]H
if (queue[k]>queue[j]) file://不用交换 j#//U2VdN
break; A]bQUWt2
SortUtil.swap(queue,j,k); zQ=b|p]|W
k = j; z/J?!ee
} ;U'\"N9
} 3= =["hO
private void fixUp(int k) { ,!{8@*!=s
while (k > 1) { =p;cJ%#2]'
int j = k >> 1; d_`MS@2
if (queue[j]>queue[k]) rnK]3Ust
break; Wr[LC&
SortUtil.swap(queue,j,k); -YQh F;/
k = j; 77M!2S_E
} WHE<E rV%
} NMkP#s7.y
Ir JSU_
} S>dHBR#AD
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} ?$/::uo
qArR5OJ
SortUtil： gkmof^
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package org.rut.util.algorithm; N*A*\B%{x'
Iy_5k8]
import org.rut.util.algorithm.support.BubbleSort; AZ!/{1Az
import org.rut.util.algorithm.support.HeapSort; AW r2Bv
import org.rut.util.algorithm.support.ImprovedMergeSort; _#K|g#p5
import org.rut.util.algorithm.support.ImprovedQuickSort; "bej#'M#
import org.rut.util.algorithm.support.InsertSort; .JKH=?~\
import org.rut.util.algorithm.support.MergeSort; C|]c#X2t3
import org.rut.util.algorithm.support.QuickSort; XNa{_3v
import org.rut.util.algorithm.support.SelectionSort; }[eUAGhDU
import org.rut.util.algorithm.support.ShellSort; oZ2:%
9y7hJib
/** t`6]eRR
* @author treeroot gxO~44"
* @since 2006-2-2 %X_A#9
* @version 1.0 tpSgbGzp
*/ !mK()#6
public class SortUtil { QDxs+<#
public final static int INSERT = 1; a?W5~?\9
public final static int BUBBLE = 2; "7sv@I_j
public final static int SELECTION = 3; Qy9_tvq X
public final static int SHELL = 4; wp~}1]g
public final static int QUICK = 5; N-l`U(Z~P
public final static int IMPROVED_QUICK = 6; L$Z!
public final static int MERGE = 7; \Hb!<mrp
public final static int IMPROVED_MERGE = 8; w#1BHx
public final static int HEAP = 9; +\+j/sa
#eYYu2ND
public static void sort(int[] data) { v^eAQoFLhN
sort(data, IMPROVED_QUICK); ir'<H<t2
} /[ m7~B]QE
private static String[] name={ 5%D`y|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0-PT%R
}; &</)k|.A6\
h HHR]e5:
private static Sort[] impl=new Sort[]{ RV@B[:
new InsertSort(), 'R1C-U3w,
new BubbleSort(), O=}w1]
new SelectionSort(), !9gpuS[
new ShellSort(), ->qRGUW
new QuickSort(), w5q6c%VZ
new ImprovedQuickSort(), `/1rZ#
new MergeSort(), Jb{g{a/
new ImprovedMergeSort(), P[aE3Felk
new HeapSort() 2L^/\!V#
}; e|C2/U-
)Fd)YJVR
public static String toString(int algorithm){ jA8Bmwt;w
return name[algorithm-1]; {31X
} tY#&_%W
s]yZ<uA
public static void sort(int[] data, int algorithm) { &2:WezDF
impl[algorithm-1].sort(data); /E/6(c
} "viZ"/~6
f`vWCb
public static interface Sort { KdiJ'K.
public void sort(int[] data); yo5-x"ze
} /slCK4vFc
*#p}FB2H#
public static void swap(int[] data, int i, int j) { %>nAPO+e
int temp = data; k=t{o
data = data[j]; "@ZwDg`
data[j] = temp; s'/_0
} V#599-
} ^Gbcs l~Gj