[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; Wd7*sa3T
} udB}`<Q
int i1=l; VC@o]t5
int i2=mid+1; eP)RP6ON{
for(int cur=l;cur<=r;cur++){ "](~VF[J8
if(i1==mid+1) XxGm,A+>Ty
data[cur]=temp[i2++]; g!8-yri
else if(i2>r) 9}=Fdt
data[cur]=temp[i1++]; `fH6E8N
else if(temp[i1] data[cur]=temp[i1++]; G8SJ<\?
else p=zjJ~DVd
data[cur]=temp[i2++]; U*Q$:%72vO
} pd|s7
} 9Ah4N2nL-b
JkKI/5h
} nm)F tX|A
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改进后的归并排序: Bn.8wMB
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package org.rut.util.algorithm.support; C$P3&k#W
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import org.rut.util.algorithm.SortUtil; 6l4l74
]k hY8it
/** }*%%GPJ
* @author treeroot <rU(zm
* @since 2006-2-2 cj[y]2{1h
* @version 1.0 Ne=D$o
*/ w$pv
public class ImprovedMergeSort implements SortUtil.Sort { 0@ -LV:jU
7L!k9"X`0F
private static final int THRESHOLD = 10; h:|aQJG5
ZjzQv)gZ
/* "m!Cl-+u
* (non-Javadoc) TPrwC~\B/
* "Kqe4$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NTV0DkX
*/ mGIS[_dcs
public void sort(int[] data) { G B15
int[] temp=new int[data.length]; j9Lc2'
mergeSort(data,temp,0,data.length-1); ]8RcZn
} {h2D}F
^P[-HA|
private void mergeSort(int[] data, int[] temp, int l, int r) { p%}oo#%J
int i, j, k; ZY83,:<
int mid = (l + r) / 2; *_ "j"{
if (l == r) pvX\kX3}
return; 6,!]x>B
if ((mid - l) >= THRESHOLD) )msqt!Ev
mergeSort(data, temp, l, mid); :5ji.g* 0
else r!;NH3 *
insertSort(data, l, mid - l + 1); !a /
if ((r - mid) > THRESHOLD) O:1YG$uKa
mergeSort(data, temp, mid + 1, r); B"G;"X
else 8 }-"&-X
insertSort(data, mid + 1, r - mid); WKN\*N<
hp)3@&T
for (i = l; i <= mid; i++) { #q%&,;4
temp = data; %zWtPxAf
} X@TQD
for (j = 1; j <= r - mid; j++) { Oq[tgmf
temp[r - j + 1] = data[j + mid]; 4\t9(_
} daaurT
int a = temp[l]; 9=:!XkT.
int b = temp[r]; v-OaH81&R
for (i = l, j = r, k = l; k <= r; k++) { `a] /e
if (a < b) { Zd042 %
data[k] = temp[i++]; }E*#VA0/nY
a = temp; uA,K}sNRZ
} else { dqcfs/XhP
data[k] = temp[j--]; s@0#w*N
b = temp[j]; pVLfZ?78
} A07FjT5w8
} 9"&HxyOfX
} )abo5
f.Jz]WXw,
/** ]@Q14
* @param data 8$S$*[-a
* @param l _Nlx)YR
* @param i gzxLHPiw
*/ ?k#-)inf)
private void insertSort(int[] data, int start, int len) { =xg pr*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DT;Hr4Z8^"
} ^IY1^x
} ._#|h5
} _ u/N#*D
} *ZAue.
#VtlXr>G
堆排序： ?NJ\l5'
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package org.rut.util.algorithm.support; R:-^,/1
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import org.rut.util.algorithm.SortUtil; N_h)L`
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/** FK0nQ{uB"
* @author treeroot RaKL KZn
* @since 2006-2-2 ob-y {x,R
* @version 1.0 Q@nxGm
*/ Sky!ZN'I
public class HeapSort implements SortUtil.Sort{ Xrc0RWXB8
7\<#z|
/* (non-Javadoc) c)+IX;q-C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0Kq\ oMn
*/ T-uI CMEf
public void sort(int[] data) { 5_#wOz0u$
MaxHeap h=new MaxHeap(); Y ~xcJH
h.init(data); ]=7}Y%6
for(int i=0;i h.remove(); l\JoWL
System.arraycopy(h.queue,1,data,0,data.length); )FYz*:f>&
} NbSkauF~b
nz~3o
private static class MaxHeap{ =T!iM2
U8;k6WT|
void init(int[] data){ C([TolZ
this.queue=new int[data.length+1]; >^{}Hjt
for(int i=0;i queue[++size]=data; $s5LzJn
fixUp(size); C&D!TR!K
} RKx" }<#+
} YOd0dKe
Yc&yv
private int size=0; }]'Z~5T
Quqts(Q)+
private int[] queue; C5$1K'X@
i.C+{QH
public int get() { "o+< \B~
return queue[1]; I5 "Z
} 9m/v^
r1}YN<+,s
public void remove() { W^Wr
SortUtil.swap(queue,1,size--); =bi:<%"
fixDown(1); TkM8GK-3
} q]DV49UK
file://fixdown C5c@@ch :
private void fixDown(int k) { ia?{]!7$
int j; 4 bw8^
while ((j = k << 1) <= size) { !"Jne'f
if (j < size %26amp;%26amp; queue[j] j++; Ivmiz{Oii
if (queue[k]>queue[j]) file://不用交换 lQ {k
break; oYG9i=lZ
SortUtil.swap(queue,j,k); KY~p>Jmh
k = j; TmxhP nJ~
} !uLz%~F
} %4*-BCP
private void fixUp(int k) { n<+g{QHi
while (k > 1) { |Ah'KpL8W
int j = k >> 1; ZEYT17g]
if (queue[j]>queue[k]) `A_CLVE
break; b3N1SC:Wn
SortUtil.swap(queue,j,k); SxI='z_S.f
k = j; -W38#_y/\
} omevF>b;
} MqDz cB]
'_N~PoV
} 0JN>w^
7o_1PwKS6
} ry)g<OA
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SortUtil： N_Q)AXr)
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package org.rut.util.algorithm; >\6Tm
P/6$T2k_
import org.rut.util.algorithm.support.BubbleSort; <=[,_P6|
import org.rut.util.algorithm.support.HeapSort; "%ou'\}
import org.rut.util.algorithm.support.ImprovedMergeSort; !W4A9Th
import org.rut.util.algorithm.support.ImprovedQuickSort; O9?t,1
import org.rut.util.algorithm.support.InsertSort; A/ZZ[B-
import org.rut.util.algorithm.support.MergeSort; `K5Lp>=R
import org.rut.util.algorithm.support.QuickSort; a~ sU
import org.rut.util.algorithm.support.SelectionSort; iI\bD
import org.rut.util.algorithm.support.ShellSort; pBl'SQccp
]/g&y5RG
/** wFI2(cQ
* @author treeroot }tJRBb
* @since 2006-2-2 n,/eT,48`
* @version 1.0 }-jS0{i
*/ Xo[j*<=0
public class SortUtil { DLggR3K_\
public final static int INSERT = 1; . 7*k}@k
public final static int BUBBLE = 2; q$RJ3{Sf
public final static int SELECTION = 3; 6Y9FU
public final static int SHELL = 4; &\6Buw_
public final static int QUICK = 5; gCfAy=-,V
public final static int IMPROVED_QUICK = 6; m.!n|_}]
public final static int MERGE = 7; mUSrCU_}
public final static int IMPROVED_MERGE = 8; 9j<qi\SSI
public final static int HEAP = 9; r&!Ebe-
%:Mi6sR|
public static void sort(int[] data) { T-,T)R`R
sort(data, IMPROVED_QUICK); $]LhE:!G
} OD{()E?1B
private static String[] name={ ~C M%WvS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w(Jf;[o
}; pV:;!+
E/+H~YzO
private static Sort[] impl=new Sort[]{ T1$=0VSEa+
new InsertSort(), y#tuwzE
new BubbleSort(), B\^myg4
new SelectionSort(), )c*NS7D~f
new ShellSort(), 0APh=Alq
new QuickSort(), ^i+ d3
new ImprovedQuickSort(), _C"=Hy{
new MergeSort(), C.]\4e
new ImprovedMergeSort(), W3Gg<!*Uo
new HeapSort() zy8Z68%E`*
}; Dnk}
nUb0R~wr$G
public static String toString(int algorithm){ 0SS,fs<w3
return name[algorithm-1]; X;:qnnO
} P'}WmE'B}F
S:5vC{
public static void sort(int[] data, int algorithm) { k|uW~I)
impl[algorithm-1].sort(data); 80m<OW1
} ;[nomxu|?
vNWCv
public static interface Sort { @~p;.=1]F
public void sort(int[] data); y-#{v.|L
} k]>1@t
WzinEo{f
public static void swap(int[] data, int i, int j) { 1F|e/h%^
int temp = data; dlv1liSXL5
data = data[j]; LK>AC9ak<
data[j] = temp; ?58,Ja
} |; [XZ ZZ
} p9X{E%A<: