[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; k]FP1\Y
} aH<BqD[#
int i1=l; Di{T3~fqU
int i2=mid+1; bv$g$
for(int cur=l;cur<=r;cur++){ 5^'PjtW6
if(i1==mid+1) -DDH)VO
data[cur]=temp[i2++]; +f/G2qY!t
else if(i2>r) D&_Ir>"\
data[cur]=temp[i1++]; !FOPFPn
else if(temp[i1] data[cur]=temp[i1++]; z:f[<`,GT
else tK)E*!
data[cur]=temp[i2++]; h-`Jd>u"
} w6>'n }
} NikY0=i
!f\,xa|M
} c]jK Y<
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改进后的归并排序: pUby0)}t
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package org.rut.util.algorithm.support; h,B ]5Of
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import org.rut.util.algorithm.SortUtil; vH_QSx;C#
nW2fB8yq
/** _U)BOE0o
* @author treeroot K~**. NF-n
* @since 2006-2-2 D*3\4=6x
* @version 1.0 *44^M{ti<
*/ l]RO'
public class ImprovedMergeSort implements SortUtil.Sort { D%k%kg0,
vtw{ A}
private static final int THRESHOLD = 10; |0YDCMq(
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/* c;DWSgIw
* (non-Javadoc) A,-UW+:
* ZY-UQ4_|u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X8l[B{|
*/ {IEc{y7?gO
public void sort(int[] data) { =fa!"$J3
int[] temp=new int[data.length]; HU]Yv+3
mergeSort(data,temp,0,data.length-1); g2L^cP>2
} <)c/PI[j
N@J "~9T
private void mergeSort(int[] data, int[] temp, int l, int r) { 0-#SvTf>;:
int i, j, k; b['Jr% "O
int mid = (l + r) / 2; W6f?/{Oo8
if (l == r) [*zB vj}G
return; HFYN(nz}[
if ((mid - l) >= THRESHOLD) qPsf`nI7
mergeSort(data, temp, l, mid); YCod\}3
else >0kn&pe7#T
insertSort(data, l, mid - l + 1); y7aBF13Kl
if ((r - mid) > THRESHOLD) HHa XK
mergeSort(data, temp, mid + 1, r); ^t4T8ejn
else -U;2 b_
insertSort(data, mid + 1, r - mid); uPbvN[~t
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for (i = l; i <= mid; i++) { VS0 &[bl
temp = data; l6ayV
} NT?Gl(
for (j = 1; j <= r - mid; j++) { 7J$
temp[r - j + 1] = data[j + mid]; M\zM-B
} 5]yQMY\2)
int a = temp[l]; v^2q\A-?
int b = temp[r]; c6gRXp'ID
for (i = l, j = r, k = l; k <= r; k++) { 1HYrJb,d
if (a < b) { :f (UZmV$
data[k] = temp[i++]; xab1`~%K
a = temp; 6J[ {?,
} else { (+}H ih
data[k] = temp[j--]; wi/Fx=w
b = temp[j]; ; V)pXLE
} ]pi"M3f_
} n'a=@/
} JK:i-
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/** ?EF[OyE
* @param data M]&F1<
* @param l Xy[O
* @param i ) jBPt&
*/ K?0f)@\nx
private void insertSort(int[] data, int start, int len) { "<6X=|C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {xb8H
} dLl/V3C6t
} -Z)j"J
} 5P~{*of
} 0OLE/T<Xv
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堆排序： SYkLia(Ty
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package org.rut.util.algorithm.support; k2{*WF
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import org.rut.util.algorithm.SortUtil; Dizc#!IGU
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/** 5etbJk
* @author treeroot 'J(rIH3U
* @since 2006-2-2 $<R\|_6J
* @version 1.0 ?v8.3EE1\o
*/ nojJGeW%
public class HeapSort implements SortUtil.Sort{ 4D(5WJ&
yn=BO`sgW
/* (non-Javadoc) "w3#2q&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6qfL-( G
*/ 7=yV8.cD
public void sort(int[] data) { Zd$a}~4~
MaxHeap h=new MaxHeap(); ,h1 z8.wD|
h.init(data); B3 fKb#T
for(int i=0;i h.remove(); Q;A1&UA2
System.arraycopy(h.queue,1,data,0,data.length); =+24jHs
} # +OEO
Q/'jwyj_
private static class MaxHeap{ K,f*}1$qM
u0^Vy#@_
void init(int[] data){ TC7&IqT
this.queue=new int[data.length+1]; 3ZRi@=kWz
for(int i=0;i queue[++size]=data; /'KCW_Q
fixUp(size); l* C>
} ^Pqj*k+F
} XV)<Oavs
jI})\5<R
private int size=0; :E ]Ys
}6zo1"
private int[] queue; -Zs.4@GH
Q+L;k R
public int get() { "9W]TG
return queue[1]; PvW {g5)S
} f.Wip)g
(bpO>4(S
public void remove() { SM%N]/@U
SortUtil.swap(queue,1,size--); 7wKN
fixDown(1); FKhmg&+>
} LIzdP,^pc
file://fixdown }G8gk"st
private void fixDown(int k) { z4GcS/3K
int j; )UBU|uYR\
while ((j = k << 1) <= size) { (9gL
if (j < size %26amp;%26amp; queue[j] j++; P`ZzrN
if (queue[k]>queue[j]) file://不用交换 }J=>nL'B
break; c8uFLM j
SortUtil.swap(queue,j,k); 7 YS'Tf
k = j; J+hiz3N
} lG[@s 'j
} =j,2
private void fixUp(int k) { -G\svwv@)
while (k > 1) { }_,\yC9F
int j = k >> 1; T!-*;yu
if (queue[j]>queue[k]) +qN}oyL
break; S5o\joc
SortUtil.swap(queue,j,k); 'OrGt_U
k = j; Bi}uL)~rD
} DxuT23. (
} HW|5'opF
z;T_%?u
} clhmpu
JATW'HWC|I
} Ep>} S
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SortUtil： c?ZM<Y"
AkMP)\Q
package org.rut.util.algorithm; }57s
aCxF{>n
import org.rut.util.algorithm.support.BubbleSort; ,"6Bw|s
import org.rut.util.algorithm.support.HeapSort; & OO0v*@{
import org.rut.util.algorithm.support.ImprovedMergeSort; 18*M
import org.rut.util.algorithm.support.ImprovedQuickSort; *dmBJi}
import org.rut.util.algorithm.support.InsertSort; SX/E@vYb
import org.rut.util.algorithm.support.MergeSort; Sj=x.Tr\
import org.rut.util.algorithm.support.QuickSort; g|STegg
import org.rut.util.algorithm.support.SelectionSort; !TNp|U!
import org.rut.util.algorithm.support.ShellSort; &TgS$c5k
q4y P\B
/** B/Jz$D
* @author treeroot h7r*5E
* @since 2006-2-2 }4Q~<2
* @version 1.0 0^lCZ,uq;
*/ 38<Z=#S
public class SortUtil { o]R*6$
public final static int INSERT = 1; '{>R-}o[3
public final static int BUBBLE = 2; 7~zd % o
public final static int SELECTION = 3; |B{@noGX
public final static int SHELL = 4; fBj-R~;0
public final static int QUICK = 5; ww? AGd
public final static int IMPROVED_QUICK = 6; j\hI, mc
public final static int MERGE = 7; d76nyQKK
public final static int IMPROVED_MERGE = 8; <cof
public final static int HEAP = 9; $O'IbA
;!~&-I0l
public static void sort(int[] data) { 1hTE^\W
sort(data, IMPROVED_QUICK); 1]&FB{l
} +,g3Xqs}X
private static String[] name={ Zk:Kux[7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OrC}WMhd
}; 9Sey&x
gZf8/Tp\z
private static Sort[] impl=new Sort[]{ s(.H"_a
new InsertSort(), }xa~U,#5
new BubbleSort(), L'?7~Cdls
new SelectionSort(), n0a|GZyO]
new ShellSort(), !"d"3coQ?
new QuickSort(), i)!2DXn
new ImprovedQuickSort(), z=FOymvC
new MergeSort(), mb\"qD5
new ImprovedMergeSort(), n g,&;E
new HeapSort() J@}PBHK+
}; aPToP.e
c0ue[tb
public static String toString(int algorithm){ ;% <[*T:*'
return name[algorithm-1]; K[q{)>,9
} JGHQzC
dZWO6k9[H
public static void sort(int[] data, int algorithm) { Q8H+=L:
impl[algorithm-1].sort(data); /R(]hmW
} ,J&\) yTP
\{EYkk0]
public static interface Sort { xqQLri}
public void sort(int[] data); "Snt~:W>
} GBY-WN4sc[
g)mjw
public static void swap(int[] data, int i, int j) { :<P3fW
int temp = data; Nsf>b8O
data = data[j]; ~K/_51O'
data[j] = temp; e"(SlR
} c5em*qCw$
} |Vo{ {)