[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; ;&%G)f
} |ZnRr
int i1=l; |U4t 8
int i2=mid+1; Lc:DJA
for(int cur=l;cur<=r;cur++){ oK3aW6
if(i1==mid+1) %"> Oy&3
data[cur]=temp[i2++]; R1=ir# U|D
else if(i2>r) 9M$N>[og
data[cur]=temp[i1++]; f8'$Mn,
else if(temp[i1] data[cur]=temp[i1++]; $ZOKB9QccC
else &`J?`l X
data[cur]=temp[i2++]; p>@S61 & [
} `bF]O"
} Y?>us
AZTn!hrU
} _p`@/[(|
^,M&PP6
改进后的归并排序: U.B=%S
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package org.rut.util.algorithm.support; p!~{<s]
"=BO,see9
import org.rut.util.algorithm.SortUtil; 5h4E>LB.B
%Fg}"=f1
/** g}]EIv{
* @author treeroot 0fd\R_"d.
* @since 2006-2-2 U~w g'
* @version 1.0 FTg4i\Wp
*/ hIr$^%
public class ImprovedMergeSort implements SortUtil.Sort { r 7mg>3
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private static final int THRESHOLD = 10; KtFxG6a
)5Bkm{v3
/* a}w%k
* (non-Javadoc) Hw"UJP
* n*oa J<o%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F|DKp[<]8
*/ ]U,K]y[Bj
public void sort(int[] data) { oe5.tkc
int[] temp=new int[data.length]; h1 D#,
mergeSort(data,temp,0,data.length-1); (BA2
} gAY%VFBP0
426)H_wx
private void mergeSort(int[] data, int[] temp, int l, int r) { 8zRb)B+
int i, j, k; %ycCNS
int mid = (l + r) / 2; Z{w{bf1&A
if (l == r) "k${5wk#Fl
return; yeCR{{B/'
if ((mid - l) >= THRESHOLD) <9s=K\-
mergeSort(data, temp, l, mid); f2#9E+IQ
else R "&(Ae?LR
insertSort(data, l, mid - l + 1); /Lc= K<
if ((r - mid) > THRESHOLD) 4P>tGO&*x
mergeSort(data, temp, mid + 1, r); Uq,M\V\
else N&0MA
insertSort(data, mid + 1, r - mid); Vd{h|=J
#NVqS5
for (i = l; i <= mid; i++) { ] _/d
temp = data; YW}1iT/H
} Iy}r'#N
for (j = 1; j <= r - mid; j++) { $DfaW3bJ
temp[r - j + 1] = data[j + mid]; 1x07ua@(v
} .=>T yq
int a = temp[l]; P'Fy,fNg
int b = temp[r]; y%H;o?<WX
for (i = l, j = r, k = l; k <= r; k++) { |-zwl8E
if (a < b) { sX&M+'h
data[k] = temp[i++]; S%ri/}qI[{
a = temp; :`Kr|3bQ
} else { @HfWAFT
data[k] = temp[j--]; RT45@
b = temp[j]; {tE/Jv $
} %(-YOTDr
} -%=StWdb
} :{9|/a
[hg|bpEG
/** )Q\ZYCPOr
* @param data K;f'&9-+i,
* @param l W7as=+;X
* @param i fJCh
*/ G5Ci"0
private void insertSort(int[] data, int start, int len) { k"SmbFn%N0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f=}Mr8W'
} eh'mSf^=p
} /S;o2\
} DJE/u qE
} wS2iyrIB
>:]fN61#
堆排序： \QUvImT
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package org.rut.util.algorithm.support; We]X+>BlO
T^a {#B
import org.rut.util.algorithm.SortUtil; 13Z6dhZu
hh"0z]
/** );h\0w>3
* @author treeroot Z"gllpDr$
* @since 2006-2-2 oQDOwM,
* @version 1.0 co3H=#2a
*/ \i-jME(sN
public class HeapSort implements SortUtil.Sort{ c 3@SgfKmk
Vk_*]wU
/* (non-Javadoc) ^c]Sl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L\og`L)5\
*/ B>?Y("E
public void sort(int[] data) { dW7dMx
MaxHeap h=new MaxHeap(); Z-<v5aF
h.init(data); YeJ95\jf
for(int i=0;i h.remove(); g]xZ^M+
System.arraycopy(h.queue,1,data,0,data.length); ~,e!t.339
} t%z7#}9$
IQ{Xj3;?y
private static class MaxHeap{ V8&/O)}o
MatC2-aV1
void init(int[] data){ bT-G<h*M
this.queue=new int[data.length+1]; (?\ZN+V)
for(int i=0;i queue[++size]=data; gE=~.P[ZX
fixUp(size); cM4?Ggn
} \|>eG u
} ^qbX9.\
savz>E&
private int size=0; :,q3?l6
Q]xW}5 /
private int[] queue; g}^/8rW
|/fbU_d
public int get() { [/uKo13
return queue[1]; %Y Rg1UKY
} W? UCo6<m
M]` Q4\
public void remove() { GP1>h.J
SortUtil.swap(queue,1,size--); a`pY&xq::
fixDown(1); eZHzo
} H5RHA^p|
file://fixdown n'*Ljp
private void fixDown(int k) { ~vl:Tb
int j; 3}:pD]`h
while ((j = k << 1) <= size) { C6"!'6 W
if (j < size %26amp;%26amp; queue[j] j++; _z4rx
if (queue[k]>queue[j]) file://不用交换 ]|`gTD6
break; jPU#{Wo#
SortUtil.swap(queue,j,k); L7Oytdc<
k = j; ~POeFZ
} Br~%S?4"o
} ^/n[5@6H
private void fixUp(int k) { S,(@Q~
while (k > 1) { PYHm6'5BtB
int j = k >> 1; $PS5xD~@
if (queue[j]>queue[k]) b"FsT
break; ,t+ATaOF
SortUtil.swap(queue,j,k); r3j8[&B"
k = j; Zc4hjg
} "}HQ)54&
} H+5]3>O-$
aY:(0en]&
} k13/yiv
+~fu-%,k
} M.8!BB7\8e
: m5u=:t
SortUtil： :s'%IGy>:
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package org.rut.util.algorithm; ygfqP
&HXSO,@
import org.rut.util.algorithm.support.BubbleSort; &yA<R::o
import org.rut.util.algorithm.support.HeapSort; (x^|
import org.rut.util.algorithm.support.ImprovedMergeSort; =-VV`
import org.rut.util.algorithm.support.ImprovedQuickSort; ONGe/CEXT
import org.rut.util.algorithm.support.InsertSort; mW-@-5Wda
import org.rut.util.algorithm.support.MergeSort; I(<G;ft<}
import org.rut.util.algorithm.support.QuickSort; u3. PHZ
import org.rut.util.algorithm.support.SelectionSort; >rFvT>@NU
import org.rut.util.algorithm.support.ShellSort; GC\/B0!
/3TorB~Y
/** I@S<D"af
* @author treeroot xRY5[=97
* @since 2006-2-2 \QMSka>
* @version 1.0 D1Sl+NOV
*/ 'j3'n0o
public class SortUtil { P~qVr#eU
public final static int INSERT = 1; yY| .
public final static int BUBBLE = 2; 3QHZC0AY
public final static int SELECTION = 3; {PVu3W
public final static int SHELL = 4; ,){0y%c#y
public final static int QUICK = 5; )[K3p{4
public final static int IMPROVED_QUICK = 6; ibuI/VDF
public final static int MERGE = 7; |"-,C}O
public final static int IMPROVED_MERGE = 8; ~Op1NE
public final static int HEAP = 9; Q]7Q
2DC#PX)i
public static void sort(int[] data) { 3 #wj-
sort(data, IMPROVED_QUICK); ;p_X7N
} l46F3C|
private static String[] name={ 0/gcSW b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;Pa(nUE@
}; *=7[Ip<X
K?tk&0
private static Sort[] impl=new Sort[]{ /< :;^B
new InsertSort(), "QF083$
new BubbleSort(), ;dFe >`~
new SelectionSort(), +i>q;=~
new ShellSort(), @ubz?5
new QuickSort(), \fz j fZ1n
new ImprovedQuickSort(), Yq^y"rw
new MergeSort(), Zb}PP;O
new ImprovedMergeSort(), g7P1]CZ}
new HeapSort() |:#mw1
}; i`SF<)M(
31*6 ;(
public static String toString(int algorithm){ JJ~?ON.H
return name[algorithm-1]; \+uqP:Ty
} biG9?
84[^#ke
public static void sort(int[] data, int algorithm) { 4r. W:}4:
impl[algorithm-1].sort(data); 19.cf3Dh
} $;CC lzw
kUUq9me&o
public static interface Sort { ZH(.|NaH
public void sort(int[] data); 1;P\mff3Y
} eI}VHBAz
f$>orVm%.
public static void swap(int[] data, int i, int j) { m#nxw
int temp = data; cBI)?
data = data[j]; %8L<KJd
data[j] = temp; mb/[2y<
} i4I0oRp
} MP,*W}@