[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; }b}m3i1
} jCY%|
int i1=l; :]"V-1#}
int i2=mid+1; gIfh3D=yX
for(int cur=l;cur<=r;cur++){ uO**E-`
if(i1==mid+1) DH=hH&[e(d
data[cur]=temp[i2++]; FwK]$4*
else if(i2>r) NHt\ U9l'
data[cur]=temp[i1++]; N#]ypl
else if(temp[i1] data[cur]=temp[i1++]; f^e)O$N9]
else 3^ClAE"8
data[cur]=temp[i2++]; 7=uj2.J6
} iCoX&"lb
} "tZe>>I
e.%nRhSs3
} 8|^7ai[am
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改进后的归并排序: AX INThJ
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package org.rut.util.algorithm.support; JJnH%Q
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import org.rut.util.algorithm.SortUtil; XZf$K_F&M
jdN`mosJ
/** ^q&x7Kv%
* @author treeroot Y2TtY;
* @since 2006-2-2 ,6/V"kqIP
* @version 1.0 x^ni1=kU
*/ }ZI7J
public class ImprovedMergeSort implements SortUtil.Sort { V9vTsmo(
Iv *<La
private static final int THRESHOLD = 10; \['Cj*ek
/FII07V
/* #_1`)VS
* (non-Javadoc) )BE1Q*= n
* '"^'MXa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (:_$5&i7
*/ hp2t"t
public void sort(int[] data) { 965jtn
int[] temp=new int[data.length]; kstIgcI
mergeSort(data,temp,0,data.length-1); b>|6t~}M
} 3Vwh|1?
H\ %7%
private void mergeSort(int[] data, int[] temp, int l, int r) { f3;5Am
int i, j, k; 1oS/`)
int mid = (l + r) / 2; #WuBL_nZ~
if (l == r) u, ff>/1
return; 3]>| i
if ((mid - l) >= THRESHOLD) 0sqFF[i
mergeSort(data, temp, l, mid); >z03{=sAN
else ^~dWU>
insertSort(data, l, mid - l + 1); qM`}{ /i
if ((r - mid) > THRESHOLD) x:;kSh
mergeSort(data, temp, mid + 1, r); Q8NX)R
else e(sk[guvX
insertSort(data, mid + 1, r - mid); Y73C5.dNcE
uH]OEz\H'
for (i = l; i <= mid; i++) { _w{Qtj~s|
temp = data; KXy6Eno
} $`c:&
for (j = 1; j <= r - mid; j++) { j.Hf/vi`z
temp[r - j + 1] = data[j + mid]; +0&/g&a\R
} #R"*c hLV
int a = temp[l]; p?!/+
int b = temp[r]; xAr\gu
for (i = l, j = r, k = l; k <= r; k++) { 8mMQ[#0:}
if (a < b) { Ulyue
data[k] = temp[i++]; =&]L00u.
a = temp; ^c<Ve'-
} else { 2HdC |$_+
data[k] = temp[j--]; /(cPfZZ
b = temp[j]; !Ee:o"jG{
} A<{{iBEI`
} d~H`CrQE*
} ?}0,o.
*g%yRU{N
/** %A`+WYeuX
* @param data t!XwW$@
* @param l vt8By@]:
* @param i n[z+<VGwC
*/ Z~CjA%l
private void insertSort(int[] data, int start, int len) { WMdg1J+~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JI}'dU>*U:
} 3$ pX
} NOva'qk
} j_AACq {.
} UVP vOtZj
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堆排序： 29KiuP
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package org.rut.util.algorithm.support; [~HN<>L@C
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import org.rut.util.algorithm.SortUtil; <YY14p
>Ry01G]_/h
/** $mILoy B,
* @author treeroot !zo{tI19
* @since 2006-2-2 a9gLg &
* @version 1.0 CrLrw T
*/ ^sw?gH*
public class HeapSort implements SortUtil.Sort{ EwN}l
0S"MC9beg
/* (non-Javadoc) s_Sk0}e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;TYBx24vD'
*/ K-4PI+qQ\
public void sort(int[] data) { _b 0&!l<
MaxHeap h=new MaxHeap(); n S=W1zf
h.init(data); ep8
for(int i=0;i h.remove(); 1#x0q:6
System.arraycopy(h.queue,1,data,0,data.length); Da|z"I x
} mt .sucT
}7Uoh(d
private static class MaxHeap{ d0D]Q
Psf#c:*_)
void init(int[] data){ /wp6KXm
this.queue=new int[data.length+1]; `3pW]&
for(int i=0;i queue[++size]=data; 'DR!9De
fixUp(size); eFgA 8kY)
} ^[[P*NX3
} ax`o>_)
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private int size=0; Tk}]Gev
j%kncGS
private int[] queue; HN"Z]/5j
M]^5s;y
public int get() { & 21%zPm
return queue[1]; By|4m
} .Mbz3;i0
?< +WG/(d
public void remove() { COlqcq'qAu
SortUtil.swap(queue,1,size--); *@5@,=d
fixDown(1); 7#XzrT]
} as|<}:V
file://fixdown qX%_uOw:%
private void fixDown(int k) { 1zv'.uu.,
int j; :;}P*T*PU
while ((j = k << 1) <= size) { ?}oFg#m-<L
if (j < size %26amp;%26amp; queue[j] j++; `?]k{ l1R
if (queue[k]>queue[j]) file://不用交换 9{l}bu/u
break; dPlV>IM$z
SortUtil.swap(queue,j,k); T)/eeZ$
k = j; FPz9N@M%Q
} o/E >f_k[
} jcOcWB|
private void fixUp(int k) { 1}x%%RD_
while (k > 1) { K?;DMUSY\
int j = k >> 1; afVT~Sf{
if (queue[j]>queue[k]) +(Ae4{z"1+
break; /v{I
SortUtil.swap(queue,j,k); )nkY_'BV
k = j; L *wYx|
} y(#e}z:
} Et$2Y-L.
^8WRqQdx
} t.<i:#rj>l
4?kcv59
} ^#pEPVkY
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SortUtil： XFl6M~ c
>MZ/|`[M
package org.rut.util.algorithm; {: /}NpA$
Txu/{M,
import org.rut.util.algorithm.support.BubbleSort; BGSw~6
import org.rut.util.algorithm.support.HeapSort; y29m/i:
import org.rut.util.algorithm.support.ImprovedMergeSort; P.cyO3l
import org.rut.util.algorithm.support.ImprovedQuickSort; -?\D\\+t
import org.rut.util.algorithm.support.InsertSort; @ArSC
import org.rut.util.algorithm.support.MergeSort; Jy)/%p~
import org.rut.util.algorithm.support.QuickSort; O.? JmE
import org.rut.util.algorithm.support.SelectionSort; {}9a6.V;}
import org.rut.util.algorithm.support.ShellSort; 3";q[&F9y
MgZ/(X E
/** 4#D,?eA7
* @author treeroot Mx}gN:Wt
* @since 2006-2-2 5P2K5,o|n~
* @version 1.0 _a, s )
*/ \bXa&Lq
public class SortUtil { =;L|gtH"
public final static int INSERT = 1; UQsN'r\tS
public final static int BUBBLE = 2; \z$= K
public final static int SELECTION = 3; VbYdZCC
public final static int SHELL = 4; )%TmAaj9d
public final static int QUICK = 5; F,kZU$
public final static int IMPROVED_QUICK = 6; 8*X4\3:*N
public final static int MERGE = 7; &=[WIG+rk
public final static int IMPROVED_MERGE = 8; }MySaL>
public final static int HEAP = 9; w0. u\
+{]j]OP
public static void sort(int[] data) { k$VlfQ'+
sort(data, IMPROVED_QUICK); 5P bW[
} PCA4k.,T
private static String[] name={ [),ige
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C!gZN9-
}; F|8&
?6!LL5a.
private static Sort[] impl=new Sort[]{ P}iE+Z3
new InsertSort(), +`4A$#$+y
new BubbleSort(), T{"(\X$
new SelectionSort(), 6]N.%Y[(
new ShellSort(), kZ~~/?B
new QuickSort(), @Qe0! (_=
new ImprovedQuickSort(), Z+SRXKQ
new MergeSort(), Jm@oDME_E
new ImprovedMergeSort(), GgU/!@
new HeapSort() g(g& TO
}; /v}`l
*8q.YuZ
public static String toString(int algorithm){ +ZYn? #IQ
return name[algorithm-1]; !D6]JPX
} !-bB559Nv
2wn2.\v M
public static void sort(int[] data, int algorithm) { `cO:<^%
impl[algorithm-1].sort(data); 4i bc
} xw%0>K[
{g6%(X\r.r
public static interface Sort { y`Fw-!'o
public void sort(int[] data); !>tL6+yj
} d9ihhqq3}
Bvj0^fSm
public static void swap(int[] data, int i, int j) { #ob/p#k
int temp = data; G}*hM$F
data = data[j]; )u">it+
data[j] = temp; *hrd5na
} V&i;\9
} sLFl!jX