[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; M+L8~BD@
} ? PI2X.6
int i1=l; O x),jc[/
int i2=mid+1; JK/gq}c
for(int cur=l;cur<=r;cur++){ 4:I'zR5
if(i1==mid+1) NT0im%
data[cur]=temp[i2++]; 6CV9ewr
else if(i2>r) joRrsxFU
data[cur]=temp[i1++]; =pCO1<wR
else if(temp[i1] data[cur]=temp[i1++]; sQXj?5!
else @2`$ XWD
data[cur]=temp[i2++]; ~Z>!SMXp<
} )Jaq5OMA/
} \-W|)H
|>~pA}
} *}P=7TuS
9 WO|g[Y3
改进后的归并排序: Q H57[Yg
k d9<&.y{
package org.rut.util.algorithm.support; Bnfp_SM
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import org.rut.util.algorithm.SortUtil; y2o~~te
K(3_1*e
/** 2X,`t%o
* @author treeroot JC.nfxG@:
* @since 2006-2-2 k^#+Wma7
* @version 1.0 Js'j}w
*/ *A([1l&]i
public class ImprovedMergeSort implements SortUtil.Sort { i}gsxq%
eUVhNg
private static final int THRESHOLD = 10; I/hq8v~S
I /z`)
/* P^57a?[`
* (non-Javadoc) v+vM:At4
* AF\gB2^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) va[r~
*/ ZZ324UuATX
public void sort(int[] data) { +GvPJI
int[] temp=new int[data.length]; d#CAP9n;'
mergeSort(data,temp,0,data.length-1); %PlA9@:IZ
} E<[Y KY
vLs*}+f
private void mergeSort(int[] data, int[] temp, int l, int r) { 7V2xg h!W
int i, j, k; [ 0z-X7=e
int mid = (l + r) / 2; Dnp><%
if (l == r) ;R([w4[~
return; dCA! R"HD
if ((mid - l) >= THRESHOLD) VZ$^:.I0
mergeSort(data, temp, l, mid); uI\6":/u
else \IP 9EFA
insertSort(data, l, mid - l + 1); O?t49=uB}
if ((r - mid) > THRESHOLD) vMzBp#MT
mergeSort(data, temp, mid + 1, r); ?UV|m
else :E.T2na
insertSort(data, mid + 1, r - mid); 8l*h\p:Q
oTg 'N
for (i = l; i <= mid; i++) { 1G8,Eah
temp = data; l?B=5*0
} abw5Gz@Ag
for (j = 1; j <= r - mid; j++) { v Q51-.g
temp[r - j + 1] = data[j + mid]; Ot{~mMDp
} oFKTBH:I
int a = temp[l]; 3<>DDY2bl
int b = temp[r]; gu"@*,hL
for (i = l, j = r, k = l; k <= r; k++) { $ZkT G
if (a < b) { zvn3i5z
data[k] = temp[i++]; dVSQG947i:
a = temp; iu.Jp92
} else { ^p~QHS/
data[k] = temp[j--]; >P ~j@Lv
b = temp[j]; >en\:pJn)'
} 4BZ7R,m#.
} j&[u$P*K
} 1&RB=7.h
?}U?Q7vx@@
/** TZhYgV
* @param data Z*'<9l_1
* @param l +g;{c+Kw:
* @param i (}rBnD
*/ P$.$M}rMv
private void insertSort(int[] data, int start, int len) { 2({|LQqk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qJE_4/<^!
} &W3Hj$>
} vX_;Y#uD
} V\AY=u
} }tL]EW^
dL~^C I
堆排序： xDNXI01o
p6&<eMwFA
package org.rut.util.algorithm.support; 5,+fM6^V
o]WcODJdl
import org.rut.util.algorithm.SortUtil; 9&{z?*
UOyM=#ipY
/** w3#0kl
* @author treeroot ~14|y|\/
* @since 2006-2-2 RKZBI?@4
* @version 1.0 b~2LD3"3
*/ V.ETuS;
public class HeapSort implements SortUtil.Sort{ z<%dWz
bVzJOBe
/* (non-Javadoc) HL-'\wtl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9I*2xy|I
*/ ?dXAHY
public void sort(int[] data) { (b.4&P"0
MaxHeap h=new MaxHeap(); y\,,hs
h.init(data); _2{2Xb
for(int i=0;i h.remove(); eJ6 #x$I,
System.arraycopy(h.queue,1,data,0,data.length); 9Vl}f^Gn
} L9oLdWa(C
u}P:9u&h6X
private static class MaxHeap{ 9{e/ V)
@R<z=n"
void init(int[] data){ z]KJ4
this.queue=new int[data.length+1]; B@S~v+Gr
for(int i=0;i queue[++size]=data; X(BX+)YR
fixUp(size); 7rYBFSp
} fg lN_
} ex^9 l b
e*}:tH
private int size=0; p+5J
HCCq9us
private int[] queue; C/QrkTi=
=M}tet }
public int get() { q<Qjc
return queue[1]; YQtq?&0Ct
} u'k+t`V&
a5aHv/W#P
public void remove() { vxug>2
SortUtil.swap(queue,1,size--); ^vTx%F
fixDown(1); `%^w-'
} ;<mcvm
file://fixdown OjNOvh&N
private void fixDown(int k) { NEPK
int j; R4T@ ]l&W
while ((j = k << 1) <= size) { on"ENT
if (j < size %26amp;%26amp; queue[j] j++; ]Yf^O @<<>
if (queue[k]>queue[j]) file://不用交换 gK(G1
break; }p-/R'
SortUtil.swap(queue,j,k); t: oQHhO?
k = j; 8'_MCx(
} KhP_U{)D
} +'+Nr<
private void fixUp(int k) { 5UOqS#"0
while (k > 1) { N=7iQ@{1
int j = k >> 1; [La}h2gz
if (queue[j]>queue[k]) %Ofw"W
break; dG8mE&$g
SortUtil.swap(queue,j,k); ^Sj;~
k = j; B2*7H
} XT*/aa-1'
} 'n1$Y%t
ZHUW1:qs
} `rK@> -
^TjC
} bfEH>pQ>#
MX?UmQ'
SortUtil： MM*~X"A
3$Vx8:Rhdn
package org.rut.util.algorithm; ~c] q:pU2
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import org.rut.util.algorithm.support.BubbleSort; if*~cPnN
import org.rut.util.algorithm.support.HeapSort; 9;uH}j8sE
import org.rut.util.algorithm.support.ImprovedMergeSort; eK5~gnv,
import org.rut.util.algorithm.support.ImprovedQuickSort; K"|~D0Qgo
import org.rut.util.algorithm.support.InsertSort; fAz4>_4
import org.rut.util.algorithm.support.MergeSort; V6_5v+n
import org.rut.util.algorithm.support.QuickSort; Y2'HP)tfIw
import org.rut.util.algorithm.support.SelectionSort; Y<kz+d,C
import org.rut.util.algorithm.support.ShellSort; \IYv9ScAx
B u%%O8
/** |Kjfh};-C
* @author treeroot \kf n,m
* @since 2006-2-2 ZXkrFA |
* @version 1.0 <P ?gP1_zi
*/ NS""][#
public class SortUtil { &cTOrG
public final static int INSERT = 1; c`hENPhW
public final static int BUBBLE = 2; *JZ9'|v_H
public final static int SELECTION = 3; X8}\m%gCU
public final static int SHELL = 4; ;&f(7 Q+T_
public final static int QUICK = 5; xdDe@G;"
public final static int IMPROVED_QUICK = 6; vJct)i
public final static int MERGE = 7; -P-8D6
public final static int IMPROVED_MERGE = 8; ;I80<SZ
public final static int HEAP = 9; zBwqIJfM
<HTz
public static void sort(int[] data) { K>LS8,8V
sort(data, IMPROVED_QUICK); :;hX$Qz
} )*6
private static String[] name={ RJd*(!y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {Y=k`t,
}; n@h$V\&\iM
AS:k&t
private static Sort[] impl=new Sort[]{ ~;pP@DA
new InsertSort(), /.rj\,
new BubbleSort(), _A& [rBm|
new SelectionSort(), tJQZRZViu
new ShellSort(), ,'t&L]
new QuickSort(), l-20X{$m:
new ImprovedQuickSort(), bivo7_
new MergeSort(), $s]&92
new ImprovedMergeSort(), ZAeJTCCk
new HeapSort() yw%ES
}; '/Vm[L$d
>ifys)wg>
public static String toString(int algorithm){ 7h!nt=8Y
return name[algorithm-1]; H8B.c%_|U
} 'qo(GGC M
zL50|U0H
public static void sort(int[] data, int algorithm) { p`Tl)[*
impl[algorithm-1].sort(data); OEzSItAI/[
} 53pfo:1'
tj8o6N#
public static interface Sort { !B{(EL=g
public void sort(int[] data); RtxAIMzh?
} OI:=>Bk
j5[>HL
public static void swap(int[] data, int i, int j) { f*hnzj
int temp = data; : 4lR`%
data = data[j]; &`>dY /Y
data[j] = temp; MIZ!+[At
} ,,IK}
} ?vF8 y;Jh