[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; *xITMi
} Xbrc_V\_
int i1=l; EEo I|
int i2=mid+1; _%23L|
for(int cur=l;cur<=r;cur++){ Mz86bb^J
if(i1==mid+1) VvT7v]
data[cur]=temp[i2++]; F,Ve,7kh
else if(i2>r) _Vf>>tuW
data[cur]=temp[i1++]; #?,"/Btq
else if(temp[i1] data[cur]=temp[i1++]; 8EX?/33$
else 3g5r}Ug
data[cur]=temp[i2++]; 0Wc_m;
} 2m} bddS
} e,Y<$kPV
NFC/4
} K-K>'T9F}
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改进后的归并排序: kbJ4CF}H
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package org.rut.util.algorithm.support; YW&`PJ9o
}Z t#OA $
import org.rut.util.algorithm.SortUtil; z-:>[Sn
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/** uBn35%
* @author treeroot Rha|Rk~
* @since 2006-2-2 `%EcQ}Nr
* @version 1.0 wh2E$b(-
*/ Aa]3jev
public class ImprovedMergeSort implements SortUtil.Sort { da_0{;wR
wA)nryXV
private static final int THRESHOLD = 10; g!o2vTt5
SU6Aq?`@
/* SJlE!MK
* (non-Javadoc) Ta/u&t4
* E7_OI7C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qZ +K4H
*/ 0IP0zil
public void sort(int[] data) { tmM; Z(9t
int[] temp=new int[data.length]; <`NsX 6t
mergeSort(data,temp,0,data.length-1); 3 `mtc@*
} %tZrP$DQ
<P6d-+
private void mergeSort(int[] data, int[] temp, int l, int r) { };EB[n
int i, j, k; =dQ/^C_hj
int mid = (l + r) / 2; zMBGpqdP
if (l == r) fny6`_O
return; C5$?Y8B3
if ((mid - l) >= THRESHOLD) fakad#O
mergeSort(data, temp, l, mid); ,"{e$|iY
else 7zJ2n/`m*
insertSort(data, l, mid - l + 1); T:9M|mD
if ((r - mid) > THRESHOLD) 9zrTf%mF
mergeSort(data, temp, mid + 1, r); wzJdS}Yy!y
else mV)t
insertSort(data, mid + 1, r - mid); t~nW&]E
-mmQ]'.0
for (i = l; i <= mid; i++) { {XUSw8W'
temp = data; yLK %lP
} B., BP
for (j = 1; j <= r - mid; j++) { H{Lt,#
temp[r - j + 1] = data[j + mid]; LU`)
} Wm5[+z|2?9
int a = temp[l]; x K\i&A
int b = temp[r]; }9#GJ:x`
for (i = l, j = r, k = l; k <= r; k++) { CdPQhv)m
if (a < b) { ;l `Ufx
data[k] = temp[i++]; Y9vVi]4
a = temp; +aPe)U<t
} else { &0:Gj3`
data[k] = temp[j--]; B,%KvL&xMX
b = temp[j]; ~ b66 ;
} 7!FiPH~kM
} ggYi7Wzsd
} burSb:JF
d(R8^v/L
/** |ITb1O`_P
* @param data \Cin%S.C
* @param l E<0Mluk
* @param i :,R>e}lM
*/ SMRCG"3qwA
private void insertSort(int[] data, int start, int len) { WX_g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z?3B1o9
} W[]|Uu/%
} &TrL!9FtJ
} nGc'xQy0
} 6"}F KRR
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堆排序： v$(Z}Hg
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package org.rut.util.algorithm.support; p|a`Q5z!
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import org.rut.util.algorithm.SortUtil; *-q&~
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/** D+jvF
* @author treeroot Sz')1<
* @since 2006-2-2 '.S02=/
* @version 1.0 j> dZ26 >N
*/ NE)w$>0M
public class HeapSort implements SortUtil.Sort{ QyZ'%T5J
&G\C[L
/* (non-Javadoc) Ah5o>ZtcO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?6x&A t
*/ }NdLd!
public void sort(int[] data) { I|c?*~7*
MaxHeap h=new MaxHeap(); 0R(['s:3`
h.init(data); 6Rq +=X
for(int i=0;i h.remove(); ^"vmIC.h
System.arraycopy(h.queue,1,data,0,data.length); *p0n^XZ% ?
} ~YviXSW
Tkp"mT v?<
private static class MaxHeap{ |q\i, }
gf4Hq&Rf
void init(int[] data){ ]_|%!/_
this.queue=new int[data.length+1]; Iq6EoDoq
for(int i=0;i queue[++size]=data; )fS6H<*
fixUp(size); t0P_$+w.>
} 9Q\B1Q
} vQ$"|8,
9]tW;?
private int size=0; '9<8<d7?
[=Nv=d<[p
private int[] queue; `(O#$n
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public int get() { o`'4EVw*
return queue[1]; $!z.[GL
} I,& gKgh
#Wb4*
public void remove() { w^3S6lK
SortUtil.swap(queue,1,size--); ]f wW dtz1
fixDown(1); !Ow M-t
} ^hT2ed +
file://fixdown )RWukr+
private void fixDown(int k) { 4`RZ&w;1H2
int j; !I91kJt7
while ((j = k << 1) <= size) { {\LLiU}MJC
if (j < size %26amp;%26amp; queue[j] j++; _l,-SQgj
if (queue[k]>queue[j]) file://不用交换 N1vA>(2A
break; a/%qn-i|p
SortUtil.swap(queue,j,k); TvRm 7
k = j; ZHoYnp-~z
} X>]<rEh
} 7s}F`fjKP
private void fixUp(int k) { {5+69&:G.
while (k > 1) { "Z dI~
int j = k >> 1; YXdo&'Q<qX
if (queue[j]>queue[k]) :."+&gb
break; 6IJ;od.\b$
SortUtil.swap(queue,j,k); cVmF'g
k = j; tWTC'Gx-J
} ,hT**(W
} 3z"%ht~;
'CG% PjCO
} mFd|JbW
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} f&$$*a
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SortUtil： !rG-[7K
ZHj7^y@P
package org.rut.util.algorithm; 7p{uRSE4._
n# FkgXP$
import org.rut.util.algorithm.support.BubbleSort; z 5~X3k7
import org.rut.util.algorithm.support.HeapSort; iqsR]mab
import org.rut.util.algorithm.support.ImprovedMergeSort; GQE7P()
import org.rut.util.algorithm.support.ImprovedQuickSort; ,wyEo>>4)
import org.rut.util.algorithm.support.InsertSort; G('UF1F
import org.rut.util.algorithm.support.MergeSort; 2B_+5
import org.rut.util.algorithm.support.QuickSort; |n(b>.X
import org.rut.util.algorithm.support.SelectionSort; %PK(Z*>
import org.rut.util.algorithm.support.ShellSort; O8LIKD_I[
A\.{(,;kp
/** ;YBk.} %
* @author treeroot dw| VH1fS
* @since 2006-2-2 +NOq>kH@
* @version 1.0 <DEu]-'>
*/ ?U2 'L2y
public class SortUtil { \GGyz{i
public final static int INSERT = 1; j& L@L.d
public final static int BUBBLE = 2; wV4MP1c$
public final static int SELECTION = 3; x3nUKQtk:8
public final static int SHELL = 4; RgzzbW
public final static int QUICK = 5; UGoB7TEfn
public final static int IMPROVED_QUICK = 6; Hig.` P
public final static int MERGE = 7; T?7++mcA
public final static int IMPROVED_MERGE = 8; 5`::#[
public final static int HEAP = 9; Z07n>|WF-
"R% RI( y{
public static void sort(int[] data) { : TqeVf
sort(data, IMPROVED_QUICK); J{nA ?[
} 1I8<6pi-
private static String[] name={ _gl1Qtv@rf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (Hs,Tj
}; /9?yw!
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private static Sort[] impl=new Sort[]{ H9WXp&
new InsertSort(), 65rf=*kz:
new BubbleSort(), LeNSjxB
new SelectionSort(), "#w%sG^_
new ShellSort(), Z!l]v.S
new QuickSort(), Yt=2HJY
new ImprovedQuickSort(), :_o^oi7G
new MergeSort(), C8} ;,
new ImprovedMergeSort(), STPRC&7;
new HeapSort() lLU8eHf\
}; pxW*kS
R pT7Nr
public static String toString(int algorithm){ P5lk3Zg'
return name[algorithm-1]; }|Bs|$q
} :b;`.`@KL_
zqp>Xw
public static void sort(int[] data, int algorithm) { EWOa2^%}Z\
impl[algorithm-1].sort(data); $|AasT5w
} 4Ujy_E?^
t8*NldC
public static interface Sort { }?sC1]-j&
public void sort(int[] data); _SU6Bd/>
} BteeQ&A|~
uhB V)Qg
public static void swap(int[] data, int i, int j) { X<g }F[Y
int temp = data; xRqA^Ad
data = data[j]; MXDUKh7v3
data[j] = temp; Ms-)S7tMz
} "ZFH_5<
} T*'WS!z