[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; NB^+Hcb$
} ojva~mnFf
int i1=l; 4>t'4p6{
int i2=mid+1; on^m2pQ *p
for(int cur=l;cur<=r;cur++){ Q# Yba
if(i1==mid+1) aTWCX${~b
data[cur]=temp[i2++]; w!kWG,{C
else if(i2>r) '73g~T%$^*
data[cur]=temp[i1++]; 'X%5i2
else if(temp[i1] data[cur]=temp[i1++]; ,%=SO 82W
else z?3t^UPW
data[cur]=temp[i2++]; :HiAjaA1pg
} 9\ulS2d
} 14DHU
5Q$.q&,
} T9'd?nw9
2j=i\B
改进后的归并排序: ]_5qME#N
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package org.rut.util.algorithm.support; ~NV 8avZ
*Ei(BrL/;
import org.rut.util.algorithm.SortUtil; o'?[6B>oj
m%s&$
/** h<0&|s*a)
* @author treeroot 4roqD;5|~|
* @since 2006-2-2 iwVsq_[]L
* @version 1.0 FL|\D
*/ MW|*Z{6*
public class ImprovedMergeSort implements SortUtil.Sort { $p;<1+!
:3N&&]
private static final int THRESHOLD = 10; AY x*Ngn
P]^BE;7T
/* }nx5
* (non-Javadoc) 1Qk]?R/DN
* $o%:ST4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;R[w}#Sm
*/ Z<IN>:l
public void sort(int[] data) { ]#sF pWI[N
int[] temp=new int[data.length]; pNnZ-R|u
mergeSort(data,temp,0,data.length-1); )45#lE3TH
} MBn ZO
;@<Rh^g]
private void mergeSort(int[] data, int[] temp, int l, int r) { rNN,!
int i, j, k; 3YO%$
int mid = (l + r) / 2; H.)Y*zK0.
if (l == r) ;O~k{5.iS
return; T B(K&3_D
if ((mid - l) >= THRESHOLD) dJ(<zz+;b
mergeSort(data, temp, l, mid); ]8+ D
else <L'6CBbP
insertSort(data, l, mid - l + 1); X#Sgf|$
if ((r - mid) > THRESHOLD) IY"+hHt
mergeSort(data, temp, mid + 1, r); |>zYUT[V
else 80GBkFjV
insertSort(data, mid + 1, r - mid); M* 0zvNg
i9+qU
for (i = l; i <= mid; i++) { <ebC]2j8cK
temp = data; *Roqie
} UC@Jsj~f
for (j = 1; j <= r - mid; j++) { Z{}+7P
temp[r - j + 1] = data[j + mid]; fNk0&M
} ;k:17&:8ue
int a = temp[l]; y2M]z:Y U
int b = temp[r]; K41Gn
for (i = l, j = r, k = l; k <= r; k++) { aoHAB<.C
if (a < b) { y!M# #K*
data[k] = temp[i++]; OPuty/^!Gw
a = temp; S;K5JBX0#
} else { ua!43Bp
data[k] = temp[j--]; nKnQ%R
b = temp[j]; SVn $!t
} %7hf6Xo=
} ,<s/K
} (yK@(euG
Am@:<J
/** d+WNg2#v
* @param data [x{Ai( /T^
* @param l g#%Egb1
* @param i Tf40lv+{
*/ 6an= C_Mb`
private void insertSort(int[] data, int start, int len) { 6]|-%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z'&tmje[?
} U1;&G
} z7_h$v
} \C<'2KZR,
} {|B 2$1':
S| |OSxZ
堆排序： 0[ZB^
j8)rz
package org.rut.util.algorithm.support; xnOd$]
aQ*?L l
import org.rut.util.algorithm.SortUtil; | Di7,$c
y>>)Yo&|
/** *cP(3n3]R
* @author treeroot P%aNbMg
* @since 2006-2-2 ?*^HZ~O1
* @version 1.0 37b6w6{D
*/ 5t,X;
public class HeapSort implements SortUtil.Sort{ VDFs.;:s
WBWIHv{j
/* (non-Javadoc) 8?hZ5QvA(j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _0|@B8!J?
*/ 4^Og9}bm
public void sort(int[] data) { Z+Cjg#+
MaxHeap h=new MaxHeap(); _BoYyJQH
h.init(data); z?n6l7sH
for(int i=0;i h.remove(); pIHpjx
System.arraycopy(h.queue,1,data,0,data.length); ` >loleI
} _>J`e7j+
l5nm.i<M
private static class MaxHeap{ a+^,EY
ws<pBC,m
void init(int[] data){ }g& KT!r
this.queue=new int[data.length+1]; BtrMv6
for(int i=0;i queue[++size]=data; eD|"?@cE
fixUp(size); O%f{\Fr
} f#McTC3C
} yqC158 P
2^%O%Pc
private int size=0; qpjiQ,\:b
,3 [FD9
private int[] queue; +4+czfz
RI<&cgWn+<
public int get() { ?pWda<&
return queue[1]; s"5nfl
} V4&a+MJ@
1)3'Y2N*
public void remove() { nErr&{C
SortUtil.swap(queue,1,size--); w"O{@2B3:H
fixDown(1); -jzoGzC3
} y;%\w-.\
file://fixdown biZ=TI2P,L
private void fixDown(int k) { D!8v$(#hR
int j; C`-CfZZ
while ((j = k << 1) <= size) { Nza@6nI"
if (j < size %26amp;%26amp; queue[j] j++; oIniy{
if (queue[k]>queue[j]) file://不用交换 6n|][! f
break; _S,UpR~2W
SortUtil.swap(queue,j,k); [_`@V4
k = j; k;K-6<^h
} 0+k..l
} +R7pdi
private void fixUp(int k) { BSL+Gjj~}
while (k > 1) { Fkg%_v$
int j = k >> 1; B.!&z-)#
if (queue[j]>queue[k]) c D.;
break; X3][C
SortUtil.swap(queue,j,k); 9e4`N"#,lI
k = j; s@E)=;!
} nvA7eTO6C
} L F&!od9[
2Da0*xn{
} [dXa,
BY9Z}/{j
} DXFDs=u
r?w>x`
SortUtil： jxZf,]>T
Dk&(QajL
package org.rut.util.algorithm; ~pHuh#>
j{johV+`8
import org.rut.util.algorithm.support.BubbleSort; %<r}V<OeR
import org.rut.util.algorithm.support.HeapSort; <m0=bm{j
import org.rut.util.algorithm.support.ImprovedMergeSort; E@6gTx*
import org.rut.util.algorithm.support.ImprovedQuickSort; a|(|!=
import org.rut.util.algorithm.support.InsertSort; 5A^8?,F@
import org.rut.util.algorithm.support.MergeSort; $inKI
import org.rut.util.algorithm.support.QuickSort; j\NCoos
import org.rut.util.algorithm.support.SelectionSort; B)/c]"@89
import org.rut.util.algorithm.support.ShellSort; Mf !S'\
f@q.kD21
/** i'10qWz
* @author treeroot Hy -)yR
* @since 2006-2-2 138v{Z
* @version 1.0 I_e7rE0`
*/ s IBP$9
public class SortUtil { 76]Z~^Y
public final static int INSERT = 1; !E|R3eX_
public final static int BUBBLE = 2; A'Z!l20_
public final static int SELECTION = 3; k2fJ
public final static int SHELL = 4; gvPHB+#A
public final static int QUICK = 5; (N/-blto
public final static int IMPROVED_QUICK = 6; x iz+R9p
public final static int MERGE = 7; p&#ju*i6z
public final static int IMPROVED_MERGE = 8; RCi8{~rIvS
public final static int HEAP = 9; 4"\x#
@BPQ >
public static void sort(int[] data) { C(UWir3mW?
sort(data, IMPROVED_QUICK); !Pt4\
} @4KKm@(p85
private static String[] name={ w `+.F;}s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qu!x#OY+
}; X]n`YF7
KS1udH^Zc
private static Sort[] impl=new Sort[]{ n2:Uu>/
new InsertSort(), HR?bnkv|id
new BubbleSort(), {U@"]{3Qx
new SelectionSort(), ,\i,2<hz.
new ShellSort(), K9Onjs%U
new QuickSort(), SL`; `//
new ImprovedQuickSort(), }_-tJ.
new MergeSort(), X"mPRnE330
new ImprovedMergeSort(), +Z-{6C
new HeapSort() X-Ev>3H
}; :fnJp9c
%Pl |3i
public static String toString(int algorithm){ AZ4:3}
return name[algorithm-1]; ,9"du
} Z15=vsV
5q'b M
public static void sort(int[] data, int algorithm) { 0M)\([W9&
impl[algorithm-1].sort(data); etUfdZ
} TXT<6(
ic3Szd^4
public static interface Sort { 2}bXX'Y
public void sort(int[] data); w`r%_o-I
} g/WDAO?d
ZoYllk
public static void swap(int[] data, int i, int j) { u~VXe
int temp = data; MmU`i ,z
data = data[j]; WnU2.:
data[j] = temp; qrjSG%i~J7
} j=G
} Fe+(+ S