[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; Ies` !W^
} \#F>R,
int i1=l; 5%@~"YCo
int i2=mid+1; bPV;"
for(int cur=l;cur<=r;cur++){ VS_I'SPPIc
if(i1==mid+1) ,F "P/`i'
data[cur]=temp[i2++]; ni<\AF]`
else if(i2>r) 8u1?\SYnb
data[cur]=temp[i1++]; nu2m5RYx
else if(temp[i1] data[cur]=temp[i1++]; >q ,Z*s>?
else l701$>>
data[cur]=temp[i2++]; w")m]LV
} z&jASL
} H%i [;
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} 8CH9&N5W5t
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改进后的归并排序: aO bp"
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package org.rut.util.algorithm.support; 9eR";Wm])
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import org.rut.util.algorithm.SortUtil; lfr^NxOU
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/** sG^{ cn
* @author treeroot .;(a;f+{;
* @since 2006-2-2 19%zcYTe
* @version 1.0 C3 BoH&
*/ {j4&'=C:
public class ImprovedMergeSort implements SortUtil.Sort { JcfGe4
!:}m-iqQ1
private static final int THRESHOLD = 10; Deq@T {
%:OX^^i;
/* XdnpL$0
* (non-Javadoc) E*s _Y
* _p^Wc.[~M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _!w69>Nj
*/ 9Q7342
public void sort(int[] data) { KJs`[,;<
int[] temp=new int[data.length]; Kb'4W-&u!
mergeSort(data,temp,0,data.length-1); LX=cx$K
} %Z-xh<&
`_BmVms
private void mergeSort(int[] data, int[] temp, int l, int r) { D@]/%;
int i, j, k; [e{D
int mid = (l + r) / 2; JEP9!y9y
if (l == r) RPjw12Ly
return; :Smyk.B2!
if ((mid - l) >= THRESHOLD) Q9;VSF)
mergeSort(data, temp, l, mid); qt4%=E;[
else ,4;'s
insertSort(data, l, mid - l + 1); B$S@xD $
if ((r - mid) > THRESHOLD) ~~Rq$'q}
mergeSort(data, temp, mid + 1, r); |Nadk(}
else [/<kPi
insertSort(data, mid + 1, r - mid); <)Y jVGG
<Ynrw4[)t
for (i = l; i <= mid; i++) { ~n(LBA
temp = data; 0r?]b*IEK
} $FZcvo3@*S
for (j = 1; j <= r - mid; j++) { B$7Cjv
temp[r - j + 1] = data[j + mid]; y k\/Cf
} Fzn!
int a = temp[l]; >\3N#S"PF
int b = temp[r]; O[p c$Pi
for (i = l, j = r, k = l; k <= r; k++) { P:5vS:s?
if (a < b) { 'QTa<Z)E
data[k] = temp[i++]; Tr;&bX5]H
a = temp; 7g%\+%F I
} else { kUr/*an
data[k] = temp[j--]; kxmsrQ>av
b = temp[j]; $I<\Yuy-M9
} }%^3
} 1Ve~P"w
} }FX:sa?5
>X5RRSo
/** 4H{$zMq8
* @param data zz8NBO
* @param l z(#dL>d$'
* @param i n;~'W*Ln0
*/ c4s,T"H
private void insertSort(int[] data, int start, int len) { >gl.ILo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o>&-B.zq
} y I[kaH"J
} 9! yDZ<s
} BL-7r=Z
} 6_:KFqc W
w{4#Q[
堆排序： Qv)DSl
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package org.rut.util.algorithm.support; Wq?vAnLbk
n;QFy5HB8
import org.rut.util.algorithm.SortUtil; _:Jma
[fs.D /
/** 8~O0P=
* @author treeroot B3I0H6O
* @since 2006-2-2 >LB*5
* @version 1.0 z$Qy<_l
*/ \3hFb,/4k
public class HeapSort implements SortUtil.Sort{ jLw|F-v-l<
-U;=]o1
/* (non-Javadoc) c_aj-`BKp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kZR(0, W
*/ "s@q(J
public void sort(int[] data) { ;{0%Vp{
MaxHeap h=new MaxHeap(); 8?w#=@s
h.init(data); "#h/sAIs
for(int i=0;i h.remove(); `1#Z9&bO
System.arraycopy(h.queue,1,data,0,data.length); 9"}5jq4*
} o :j'd
)q[Wzx_ j<
private static class MaxHeap{ s%A?B8,
aPX'CG4m
void init(int[] data){ 14(ct
this.queue=new int[data.length+1]; hE'>8{
for(int i=0;i queue[++size]=data; x Vw1
fixUp(size); OU*skc>
} 0%yPuY>
} w BoP&l
~b%dBn]n>
private int size=0; M} +s_h9
V}FH5z |
private int[] queue; CX; m8
O8-Z >;
public int get() { ViUx^e\
return queue[1]; 1k{H,p7
} (@bq@0g
QoMa+QTuc
public void remove() { 9Fg:
SortUtil.swap(queue,1,size--); .Y }k@T40a
fixDown(1); iEbW[sX[4
} 7Q~$&G
file://fixdown *9`k$'
private void fixDown(int k) { 3~LNz8Z*
int j; G)gb5VW k
while ((j = k << 1) <= size) { -oY8]HrXfK
if (j < size %26amp;%26amp; queue[j] j++; cmY `$=
if (queue[k]>queue[j]) file://不用交换 )"63g
break; V5 Gy|X
SortUtil.swap(queue,j,k); 8<J3Xe
k = j; PK&X | h
} ]1I-e2Q-J
} 7UUu1"|a|
private void fixUp(int k) { \vuWypo
while (k > 1) { .s|5AC[
int j = k >> 1; q77Iq0VR
if (queue[j]>queue[k]) Pu'lp O
break; 6H0aHCM
SortUtil.swap(queue,j,k); V8Z@y&ny
k = j; ZbH_h]1$D
} j_b/66JyN
} Zj0h0Vt
7>EMr}f C
} rAD4}A_w
4z^~,7J^
} 5H( ]"C
w*u.z(:a`
SortUtil： iL~(BnsF
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package org.rut.util.algorithm; cVSns\QO
lGJ&\Lv:
import org.rut.util.algorithm.support.BubbleSort; v2YU2-X[
import org.rut.util.algorithm.support.HeapSort; ]#rNz"
import org.rut.util.algorithm.support.ImprovedMergeSort; ^GiWU +`
import org.rut.util.algorithm.support.ImprovedQuickSort; 'G`xD3 E3,
import org.rut.util.algorithm.support.InsertSort; !"ydl2
import org.rut.util.algorithm.support.MergeSort; CM t$)
import org.rut.util.algorithm.support.QuickSort; z*o2jz?t4
import org.rut.util.algorithm.support.SelectionSort; LwH+X:?i
import org.rut.util.algorithm.support.ShellSort; t{Ks}9B
\#gguq?[
/** msOE#QL6a
* @author treeroot Q*8x Bi1
* @since 2006-2-2 e|^.N[W
* @version 1.0 M-8d*#_P
*/ _&]Gw, ~/i
public class SortUtil { ;h#Q!M&e#
public final static int INSERT = 1; vJ;0%;eu[!
public final static int BUBBLE = 2; }hXmK.['
public final static int SELECTION = 3; G+m[W
public final static int SHELL = 4; VY@`)
public final static int QUICK = 5; %d /]8uO
public final static int IMPROVED_QUICK = 6; .4y44: T
public final static int MERGE = 7; drp< f1`l8
public final static int IMPROVED_MERGE = 8; Tq8U5#NF
public final static int HEAP = 9; "DRiJ.|APs
F#RtU :R
public static void sort(int[] data) { T6\d]
sort(data, IMPROVED_QUICK); w~n+hhMF
} }xgs]\^,73
private static String[] name={ yXf+dMv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j3[kG#
}; G420o}q
Q=epUHFs
private static Sort[] impl=new Sort[]{ dSS Ai |}
new InsertSort(), nr&9\lG]G
new BubbleSort(), |WgFLF~k
new SelectionSort(), a24(9(yh
new ShellSort(), +;q`A1
new QuickSort(), /KlSI<T@
new ImprovedQuickSort(), )1<GSr9
new MergeSort(), oF s)UR
new ImprovedMergeSort(), D$`$4mX@hP
new HeapSort() _znpzr9H
}; e_FoNT
41+@!`z7
public static String toString(int algorithm){ 2l~qzT-
return name[algorithm-1]; S4!B;,?AxN
} }3-`e3
o%$R`;
public static void sort(int[] data, int algorithm) { )t,efg
impl[algorithm-1].sort(data); `mquGk|)
} tHFUV\D;,
~^o YPd52*
public static interface Sort { m;vm7]5
public void sort(int[] data); l_ LH!Tu
} ZtpbKy!\$B
Q@Cy\l
public static void swap(int[] data, int i, int j) { !z5Ozm+}
int temp = data; -R`nitf
data = data[j]; Y{8}z ZD
data[j] = temp; l4^MYwFR{O
} i~m;Ah,#
} /@",5U#