[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; -(TC'
} ]*| hd/j
int i1=l; #1$4<o#M
int i2=mid+1; 3v_j*wy
for(int cur=l;cur<=r;cur++){ K Ha,6X
if(i1==mid+1) Sc{&h8KMTb
data[cur]=temp[i2++]; rT4Q^t"
else if(i2>r) I= :yfW
data[cur]=temp[i1++]; el5Pe{j'
else if(temp[i1] data[cur]=temp[i1++]; fpQFNV
else d)uuA;n
data[cur]=temp[i2++]; u^Nxvx3l0
} fB~O |g
} bVoU|`c
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} 9u,8q:I.?
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改进后的归并排序: L[?nST18%
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package org.rut.util.algorithm.support; ~|r~NO 7[
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import org.rut.util.algorithm.SortUtil; _1^8xFe2
5@P%iBA4(3
/** `)R?nVb
* @author treeroot )K~w'TUr
* @since 2006-2-2 "S5S|dBc
* @version 1.0 9!9> ?Z
*/ AR%hf
public class ImprovedMergeSort implements SortUtil.Sort { ?Z q_9T7
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private static final int THRESHOLD = 10; bGv*-;*
CI`N8 f=v
/* N.Dhu~V
* (non-Javadoc) ''IoC j
* s/ M7Zl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0$6*o}N%
*/ kt^yj"C>
public void sort(int[] data) { Q1Ux!$_
int[] temp=new int[data.length]; EYL]TeS
mergeSort(data,temp,0,data.length-1); (;aB!(_
} 9UwLF`XM
JqEW=5
private void mergeSort(int[] data, int[] temp, int l, int r) { Bv$UFTz
int i, j, k; 5[C~wvO
int mid = (l + r) / 2; AUfS-
if (l == r) 7+}JgUh
return; e,HMwD
if ((mid - l) >= THRESHOLD) \m4T3fy
mergeSort(data, temp, l, mid); 7JUbVa%
else *8bK')W
insertSort(data, l, mid - l + 1); f~=r*&U
if ((r - mid) > THRESHOLD) )MZC>:
mergeSort(data, temp, mid + 1, r); \fZiL!E^7
else |uI?ySF
insertSort(data, mid + 1, r - mid); H;NbQ
q$[n`w-
for (i = l; i <= mid; i++) { B**Nn!}0
temp = data; nnwJYEi
} c%z'xM
for (j = 1; j <= r - mid; j++) { -v]Qhf&>
temp[r - j + 1] = data[j + mid]; DP9LO_{
} \M{[f=6llh
int a = temp[l]; RRADg^}l|"
int b = temp[r]; wv?RO*E
for (i = l, j = r, k = l; k <= r; k++) { ;o0#(xVz
if (a < b) { x)SralWb
data[k] = temp[i++]; b9~A-Z
a = temp; 9sSN<7
} else { `'i( U7?
data[k] = temp[j--]; hmpr%(c`
b = temp[j]; 7]Em,
} T%$jWndI
} qmglb:"
} $A2n{
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/** Qd]we$G
* @param data ST1'\Eo
* @param l j.m(ltGh
* @param i 8w_7O>9
*/ >|g?wC}V;
private void insertSort(int[] data, int start, int len) { KkcXNjPVS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xb:&(6\F
} r^0F"9eOL
} -MBV$:_R
} 5'KA'>@
} s@8w-]"
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堆排序： M5g\s;y;
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package org.rut.util.algorithm.support; =>iA gp'#
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import org.rut.util.algorithm.SortUtil; j$Ab>}g]
.iG&Lw\,
/** ICC%,$C~l
* @author treeroot !| #83
* @since 2006-2-2 Q>Qibr
* @version 1.0 KC`q#&dt
*/ >R\lqLILb,
public class HeapSort implements SortUtil.Sort{ ]QVNn?PA8
:9|\Z|S(I
/* (non-Javadoc) /,@p\Ae5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -VxDNT}Tr
*/ \$sjrqKnu
public void sort(int[] data) { q1?&Ev^
MaxHeap h=new MaxHeap(); 0@I S
h.init(data); zCv"]%
for(int i=0;i h.remove(); y5r4+2B
System.arraycopy(h.queue,1,data,0,data.length); 7aV%=_
} ,:LA.o}h
lVOu)q@l7g
private static class MaxHeap{ nKa$1RMO
":a\z(*t
void init(int[] data){ $+p?Y)h .
this.queue=new int[data.length+1]; ryB}b1`D
for(int i=0;i queue[++size]=data; 2i;7{7
fixUp(size); FMA6_fju4
} Q7Iw[=;\
} 0:w"M<80
SZaS;hhhHu
private int size=0; ?POUtRN
#Cpd9|
private int[] queue; g0R~&AN!g
h/?l4iR*
public int get() { HK`I\,K
return queue[1]; 8>hwK)av
} <-D/O$q
8Nu=^[qwQM
public void remove() { }PTV] q%
SortUtil.swap(queue,1,size--); hxQqa 0B
fixDown(1); !;?+>R)h
} C8 \5A8c
file://fixdown dXF^(y]l
private void fixDown(int k) { F~h7{@\
int j; X}+>!%W!}
while ((j = k << 1) <= size) { o2<#s)GpY
if (j < size %26amp;%26amp; queue[j] j++; wgCa58H76
if (queue[k]>queue[j]) file://不用交换 0lhVqy}:}o
break; "g$IP9?U
SortUtil.swap(queue,j,k); sI{ M
k = j; g+J-Zg6
} BNL;Biyt7
} +v=C@2T
private void fixUp(int k) { dqN5]Sb2B
while (k > 1) { yUpgoX(6
int j = k >> 1; ,7<f9 EVY
if (queue[j]>queue[k]) [VE8V-
break; 7(pF[LCF
SortUtil.swap(queue,j,k); h*-Pr8
k = j; 4^M
} {{QELfH2
} D8$G`~hD
6oGYnu;UZ
} gHo?[pS%y
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} :Of^xj>A
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SortUtil： =>_\fNy
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package org.rut.util.algorithm; #`)(e JF
, GP?amh
import org.rut.util.algorithm.support.BubbleSort; h2XfC.f
import org.rut.util.algorithm.support.HeapSort; y!_C/!d
import org.rut.util.algorithm.support.ImprovedMergeSort; 4rLL[??
import org.rut.util.algorithm.support.ImprovedQuickSort; )r jiY%F$
import org.rut.util.algorithm.support.InsertSort; JsODzw
import org.rut.util.algorithm.support.MergeSort; i%0ur}p
import org.rut.util.algorithm.support.QuickSort; tP$<UKtU
import org.rut.util.algorithm.support.SelectionSort; eQ]~dA8>
import org.rut.util.algorithm.support.ShellSort; #T'{ n1AI
$w`=z<2yo1
/** Y2~nBb
* @author treeroot Pu"P9
* @since 2006-2-2 toBHkiuD
* @version 1.0 (2$p{Uf
*/ y.< m#Zzt
public class SortUtil { *^VRGfpb
public final static int INSERT = 1; |l]XpWV
public final static int BUBBLE = 2; Yp^rR }N
public final static int SELECTION = 3; X:nN0p #
public final static int SHELL = 4; RwpdRBb
public final static int QUICK = 5; ~E2KZm
public final static int IMPROVED_QUICK = 6; %D\[*
public final static int MERGE = 7; >JFO@O5
public final static int IMPROVED_MERGE = 8; ~d|A!S`
public final static int HEAP = 9; f Sa"%8%
r{L> F]Tw
public static void sort(int[] data) { PgF* 1
sort(data, IMPROVED_QUICK); of%Ktm5Qi
} Y[}>CYO
private static String[] name={ -"'j7t:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }HFN3cq;C
}; U`,6 * MS
i:Y^{\Z?V
private static Sort[] impl=new Sort[]{ <7/R,\Wg~
new InsertSort(), Z`ID+
new BubbleSort(), su{poQ}K
new SelectionSort(), 0"
new ShellSort(), Q ayPo]O
new QuickSort(), R;&AijS8
new ImprovedQuickSort(), SB H(y)
new MergeSort(), &^}1O:8e
new ImprovedMergeSort(), DgId_\Ze
new HeapSort() 96( v
}; e>+i>/Fn{h
cQy2"vtU
public static String toString(int algorithm){ Lt?lv2k=L
return name[algorithm-1]; vWzm@
} SJb&m-
PUp6Q;AdQ
public static void sort(int[] data, int algorithm) { J\twZ>w~0
impl[algorithm-1].sort(data); n'n/Tu
} @\0ez<.p}
BC&S>#\
public static interface Sort { ;=)k<6
public void sort(int[] data); =_JjmTy;a
} cM(:xv
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public static void swap(int[] data, int i, int j) { >N^Jj:~l
int temp = data; yr)G]K[/
data = data[j]; B nFwlw
data[j] = temp; LGq'WU31:)
} oK9( /v
} Y[ j6u\y