[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; Gxk=]5<7
} .U|e#t
int i1=l; V {R<R2h1
int i2=mid+1; g _fvbVX
for(int cur=l;cur<=r;cur++){ xo#&&/6
if(i1==mid+1) D6&fDhO27
data[cur]=temp[i2++]; .ruGS.nS4
else if(i2>r) /5M@>A^?'
data[cur]=temp[i1++]; 9An_zrJ%i
else if(temp[i1] data[cur]=temp[i1++]; fRKO> /OT
else 5HP6o
data[cur]=temp[i2++]; ?d`?Ss;v
} ZzfGs
} |0nbO2}
-N`j` zb|
} u,<I%
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改进后的归并排序: X51pRP $R
7MIu-x|
package org.rut.util.algorithm.support; !%b.k6%>w
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import org.rut.util.algorithm.SortUtil; R~u0!
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/** [OJ@{{U%
* @author treeroot m)4s4P57y
* @since 2006-2-2 .m_yx{FZ=
* @version 1.0 jG=*\lK6
*/ A[L+w9
public class ImprovedMergeSort implements SortUtil.Sort { 4Fhiac
"-JJ6Bk
private static final int THRESHOLD = 10; pnin;;D*
\zA$|) x
/* O[[:3!6q
* (non-Javadoc) h_6QVab@
* #iD5& klo\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UKyOkuY:w
*/ =&?}qa(P
public void sort(int[] data) { Hb5^+.xur
int[] temp=new int[data.length]; V#jFjObTN
mergeSort(data,temp,0,data.length-1); {'dpRq{c|
} l{wHu(1
.um]1_= \
private void mergeSort(int[] data, int[] temp, int l, int r) { H?tonG.^(
int i, j, k; Kd}cf0
int mid = (l + r) / 2; J \U}U'qP
if (l == r) \[&`PD
return; <(x[Qp/5P
if ((mid - l) >= THRESHOLD) 1c);![O
mergeSort(data, temp, l, mid); +T:F :X`
else +P,hT
insertSort(data, l, mid - l + 1); #I[tsly}
if ((r - mid) > THRESHOLD) l +RT>jAmK
mergeSort(data, temp, mid + 1, r); TTcMIMyLT
else zt{?Ntb
insertSort(data, mid + 1, r - mid); [B3qZ"
$7~k#_#PC
for (i = l; i <= mid; i++) { ws9F~LmLbr
temp = data; shjbb
} j48cI3C
for (j = 1; j <= r - mid; j++) { vwQY_J8
temp[r - j + 1] = data[j + mid]; prE~GO7Z
} :3F&NsgHH
int a = temp[l]; <;\T e4g[
int b = temp[r]; xvP<~N-
for (i = l, j = r, k = l; k <= r; k++) { yiyyw,iy
if (a < b) { xsS/)R?
data[k] = temp[i++]; *njdqr2c~
a = temp; ,lSt}Lml
} else { 4L#q?]$
data[k] = temp[j--]; "l~wzPY)
b = temp[j]; e#0C
} j>XM+>
} bnBnE[y<'
} {U8Sl.
{>[,i`)
/** }.O,P'k
* @param data G]5m@;~l5
* @param l b['Jr% "O
* @param i Z4NNrA#
*/ HV'xDy[)
private void insertSort(int[] data, int start, int len) { $I&DAGV0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *FyBkG'
} vk\a>};
} hnha1 f
} 7z!|sPW](b
} Y$SZqW0!/
hMz= \)Pl
堆排序： +e_NpC
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package org.rut.util.algorithm.support; #JVw`=P
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import org.rut.util.algorithm.SortUtil; |&Gm.[IX;q
xI?%.Z;*+
/** x5\C MWW
* @author treeroot )G6{JL-I
* @since 2006-2-2 UD1R_bL}
* @version 1.0 ~oO>6
*/ xaQ]Vjw
public class HeapSort implements SortUtil.Sort{ -g8G47piX:
+O P8U]~
/* (non-Javadoc) "PH}\Dl=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O#}T.5t
*/ 8Wx>,$k
public void sort(int[] data) { En$-,8\%
MaxHeap h=new MaxHeap(); 3'WJx=0?
h.init(data); l;^Id#N
for(int i=0;i h.remove(); fT1/@
System.arraycopy(h.queue,1,data,0,data.length); <A?- *
} ]5W|^%
+[C(hhk("
private static class MaxHeap{ &rs+x<
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void init(int[] data){ rvjPm5[t
this.queue=new int[data.length+1]; 9^ITP!~e*
for(int i=0;i queue[++size]=data; b^b@W^\hn
fixUp(size); 0Q>f,}W%>
} P)x&9OHV
} qP? V{N
rhU]b $A
private int size=0; RWM9cV5
3>X]`Oj7y
private int[] queue; kBZnR$Cl
ZN75ONL
public int get() { |uT|(:i84,
return queue[1]; O>UG[ZgW
} &u) R+7bl,
#&zNYzI
public void remove() { }gw \w?/
SortUtil.swap(queue,1,size--); k?-GI[@X
fixDown(1); $<R\|_6J
} M6J~%qF^
file://fixdown $g? ]9}p
private void fixDown(int k) { :D(4HXHK%
int j; le1
while ((j = k << 1) <= size) { e<wA["^
if (j < size %26amp;%26amp; queue[j] j++; C-Y~T;53
if (queue[k]>queue[j]) file://不用交换 @H%)!f]zWt
break; `)e5pK
SortUtil.swap(queue,j,k); x {Z_rD
k = j; A.nU8
} c*LB=;npI
} q~_DR4xZ
private void fixUp(int k) { +>BLox6
while (k > 1) { ph*9,\c8
int j = k >> 1; qRk&bF/
if (queue[j]>queue[k]) ;tK%Q~To
break; tQz=_;jy
SortUtil.swap(queue,j,k); 98 dl -?
k = j; rN0G|
} x'dU[f(
} ;!H<W[
R+vago:
} D; xRgHn
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} hgt@Mb
/SDN7M]m!
SortUtil： -Zs.4@GH
Q+L;k R
package org.rut.util.algorithm; "9W]TG
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import org.rut.util.algorithm.support.BubbleSort; FvX<(8'#a
import org.rut.util.algorithm.support.HeapSort; CG@3z@*?.
import org.rut.util.algorithm.support.ImprovedMergeSort; GQ=Zp3[
import org.rut.util.algorithm.support.ImprovedQuickSort; 'T G43^
import org.rut.util.algorithm.support.InsertSort; }G8gk"st
import org.rut.util.algorithm.support.MergeSort; z4GcS/3K
import org.rut.util.algorithm.support.QuickSort; )UBU|uYR\
import org.rut.util.algorithm.support.SelectionSort; %eK=5Er jx
import org.rut.util.algorithm.support.ShellSort; Sg#$ B#g
SrlTwcD
/** &>Zm gz
* @author treeroot 1<gY
* @since 2006-2-2 \<k5c-8Hb
* @version 1.0 gumT"x .^
*/ er<yB#/;-
public class SortUtil { +fh@m h0[
public final static int INSERT = 1; c3S}(8g5.
public final static int BUBBLE = 2; Tp vq5Cz
public final static int SELECTION = 3; QH z3
public final static int SHELL = 4; [4p~iGC
public final static int QUICK = 5; b)+nNqY|
public final static int IMPROVED_QUICK = 6; pxf(C<y6_
public final static int MERGE = 7; Bi}uL)~rD
public final static int IMPROVED_MERGE = 8; M8_f{|!&
public final static int HEAP = 9; ;U+4!N
QT\||0V~p
public static void sort(int[] data) { Ag[Zs%X
sort(data, IMPROVED_QUICK); Kkfza
} *uJ0ZO9
private static String[] name={ {owXyQ2mK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rlUo#
}; q<Tx'Ya
#bI,;]T
private static Sort[] impl=new Sort[]{ 6z-ZJ|?
new InsertSort(), hA'i|;|ZYc
new BubbleSort(), ^/'zU,
new SelectionSort(), 18*M
new ShellSort(), *dmBJi}
new QuickSort(), SX/E@vYb
new ImprovedQuickSort(), Sj=x.Tr\
new MergeSort(), )P13AfK
new ImprovedMergeSort(), Gm`#0)VC
new HeapSort() bCa%$
}; I 68Y4s
38<Z=#S
public static String toString(int algorithm){ /RG>n
return name[algorithm-1]; sej$$m R
} zD"n7;
%P8*Az&]T
public static void sort(int[] data, int algorithm) { =1MVF
impl[algorithm-1].sort(data); 2}\/_Y6
} zf4\V F
#gq!L
public static interface Sort { I$0O4
public void sort(int[] data); Q9G\T:^ury
} VTUY#+3
o=zr]vv
public static void swap(int[] data, int i, int j) { n0a|GZyO]
int temp = data; f(Su
data = data[j]; !VDNqW
data[j] = temp; ?zk#}Ex1
} ,K WIuCU;
} 7g7[a/Bts