[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; SGZYDxFC@
} EJC}"%h
int i1=l; um]*nXIr
int i2=mid+1; 1_LKqBgo
for(int cur=l;cur<=r;cur++){ lY`WEu
if(i1==mid+1) "~=}&
data[cur]=temp[i2++]; T<7}IH$6xE
else if(i2>r) E#m^.B-}
data[cur]=temp[i1++]; YK8l#8K
else if(temp[i1] data[cur]=temp[i1++]; V4"o.G3\o
else M_E$w$l2<
data[cur]=temp[i2++]; adoK-bSt
} YGChVROG~
} !vl1#@
bupW*fD:
} sOWP0xY
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改进后的归并排序: 5?>Q[a.Ne
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package org.rut.util.algorithm.support; j^8Hjg
7SkW!5
import org.rut.util.algorithm.SortUtil; ,:}VbQ:3I
md{1Jn"
/** 78xiT
* @author treeroot 6@^ ?dQ
* @since 2006-2-2 B\AyG4J
* @version 1.0 r\b$/:y<e
*/ -6F\=
public class ImprovedMergeSort implements SortUtil.Sort { u{WI 4n?
aF"PB h=
private static final int THRESHOLD = 10; ]nIVP
f~=e
/* }o GMF~
* (non-Javadoc) "0G)S'
* mp(:D&M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QxEmuiN
*/ O&.gc p!
public void sort(int[] data) { tJd/uQJ
int[] temp=new int[data.length]; ri"=)]
mergeSort(data,temp,0,data.length-1); x51p'bNy
} !_o1;GzK
25xt*30M
private void mergeSort(int[] data, int[] temp, int l, int r) { A#~CZQY^$
int i, j, k; PL\4\dXB
int mid = (l + r) / 2; !C' Y 7
if (l == r) Gqar5
return; "$%&C%t
if ((mid - l) >= THRESHOLD) 6 ;\>,
mergeSort(data, temp, l, mid); y>UQm|o<W
else /WAOpf5
insertSort(data, l, mid - l + 1); +@Kq
if ((r - mid) > THRESHOLD) uZ1G,9
mergeSort(data, temp, mid + 1, r); "[L+LPET
else =%FhY^-
insertSort(data, mid + 1, r - mid); _3KfY
,+n{xI2
for (i = l; i <= mid; i++) { 5iItgVTW
temp = data; = p2AK\
} C0e oV}
for (j = 1; j <= r - mid; j++) { M|z4Dy
temp[r - j + 1] = data[j + mid]; .0y .0=l
} Y5IQhV.
int a = temp[l]; Y-DHW/Z~
int b = temp[r]; $*0XWrE
for (i = l, j = r, k = l; k <= r; k++) { rJd-e96
if (a < b) { F+Hmp\rM#
data[k] = temp[i++]; Z +}# Ic
a = temp; FO|Eg9l
} else { hdH-VR4
data[k] = temp[j--]; d{'u97GDc
b = temp[j]; gWjz3ob
} |2X+( F Ed
} ]'i}}/}u2
} /LCRi
HFj@NRE6
/** a=^>A1=
* @param data h7\16j
* @param l pvqbk2BO
* @param i Q@l.p-:^U
*/ +r =p,leb
private void insertSort(int[] data, int start, int len) { ZoKXao
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lS`VJA6l.
} x5W@zqj
} RjR
} g>f_'7F&
} :?gk=JH:
Q;p% VQ
堆排序： CM%;r5
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package org.rut.util.algorithm.support; za4:Jdr
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import org.rut.util.algorithm.SortUtil; =G/`r!r*0I
AUkePp78
/** ,?!4P+ob
* @author treeroot G-T2b,J [
* @since 2006-2-2 1FEY&rpR
* @version 1.0 :+S~N)0j^
*/ (>x_fDv
public class HeapSort implements SortUtil.Sort{ -f[95Z3}
`>}e 5
/* (non-Javadoc) Zo5.Yse
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v/7iu*u
*/ F, p~O{ Q
public void sort(int[] data) { dr7ry"5Zq
MaxHeap h=new MaxHeap(); :j#Fq d[DF
h.init(data); }W R?n
for(int i=0;i h.remove(); M$GZK'%
System.arraycopy(h.queue,1,data,0,data.length); Jp`qE
} ulnlRx
PEAo'63$
private static class MaxHeap{ T .L>PL?=
mOi 8W,2
void init(int[] data){ {BJn9B
this.queue=new int[data.length+1]; [mI;>q
for(int i=0;i queue[++size]=data; M)CE%/P
fixUp(size); UzmD2AsO"
} pSJc.j
} a<`s'N1G
k39;7J
private int size=0; ?qjlWCV|e
!+I!J s"
private int[] queue; P"mD73a
( u}tUv3
public int get() { tqe8:\1yK
return queue[1]; a)Ca:p
} B mxBbg
APucA
public void remove() { js\|xfDxP
SortUtil.swap(queue,1,size--); /F6=iHK(l
fixDown(1); h/n&&J
} >)PcK
file://fixdown ;O7<lF\7o
private void fixDown(int k) { 9i+SU|;j
int j; w[wrZ:[
while ((j = k << 1) <= size) { </8F
if (j < size %26amp;%26amp; queue[j] j++; J'>i3eLq
if (queue[k]>queue[j]) file://不用交换 =XT}&D6
break; "V/6 nuCo
SortUtil.swap(queue,j,k); U#!f^@&AB
k = j; !G3d5d2)C
} 07L1 "
} o=VDO,eS
private void fixUp(int k) { 7Z<ba^r}
while (k > 1) { 6>Szxkz
int j = k >> 1; >A;9Ee"&
if (queue[j]>queue[k]) /?j vv&
break; Lk|%2XGO&
SortUtil.swap(queue,j,k); r|tTDKGQ
k = j; XZFM|=%X
} _7"G&nZ0
} Pb^Mc <j
("L&iu\`@
} Bzw!,(u/ "
4U;6 2 jq
} k/ 9S
^B|Q&1
SortUtil： B@W`AD1^{
@ukIt
package org.rut.util.algorithm; !h0#es\
tb-:9*2j-
import org.rut.util.algorithm.support.BubbleSort; AG$S;)Yl9c
import org.rut.util.algorithm.support.HeapSort; ]dKLzW:l
import org.rut.util.algorithm.support.ImprovedMergeSort; &u'$q
import org.rut.util.algorithm.support.ImprovedQuickSort; f6h!wx
import org.rut.util.algorithm.support.InsertSort; [nam H a
import org.rut.util.algorithm.support.MergeSort; X_eh+>D
import org.rut.util.algorithm.support.QuickSort; =i/7&gC
import org.rut.util.algorithm.support.SelectionSort; C"P40VQoo
import org.rut.util.algorithm.support.ShellSort; ,:QzF"MV
'bXm,Ed
/** 1c} %_Z/
* @author treeroot A%pBvULH
* @since 2006-2-2 #X(KW&;m
* @version 1.0 .;0?r9
*/ IE-c^'W=}m
public class SortUtil { I(*4N^9++
public final static int INSERT = 1; O!D0hW4
public final static int BUBBLE = 2; !V6O~#
public final static int SELECTION = 3; q >|:mXR
public final static int SHELL = 4; ^Z{W1uYi
public final static int QUICK = 5; aD1G\*AFJ
public final static int IMPROVED_QUICK = 6; W~J>Srt
public final static int MERGE = 7; -4&SYCw
public final static int IMPROVED_MERGE = 8; f"j"ZM{~U
public final static int HEAP = 9; :i&ZMH,O
Lii,L}
public static void sort(int[] data) { \lnpsf
sort(data, IMPROVED_QUICK); Ls#=R
} ]iyJ>fC
private static String[] name={ ESl-k2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n'yC-;
}; SJRiMR_F~
f<V#Yc(U}
private static Sort[] impl=new Sort[]{ :1eJc2o
new InsertSort(), 5m`@ 4%)zp
new BubbleSort(), \)=X=yn2
new SelectionSort(), yk4Huq&2
new ShellSort(), q#$4Kt;
new QuickSort(), 3:f<cy
new ImprovedQuickSort(), 3JiJ,<,7
new MergeSort(), ~@x@uY$5
new ImprovedMergeSort(), %8)GuxG*
new HeapSort() tTT./-*0
}; )pS1yYLj
4|ryt4B
public static String toString(int algorithm){ aD aQ7i
return name[algorithm-1]; Qo!/]\
} ckXJ9>
<m"yPi3TY
public static void sort(int[] data, int algorithm) { I-E}D"F;p[
impl[algorithm-1].sort(data); "(6]K}k@
} #-ioLt%
ZE@!s3\
public static interface Sort { 30(O]@f~
public void sort(int[] data); 2Rc'1sCth-
} xD}ha
2},|RQETy
public static void swap(int[] data, int i, int j) { mX)UoiXue
int temp = data; VuDSjh
data = data[j]; Kf<-PA
data[j] = temp; X&1R6O
} -'FzH?q:
} .u3!%{/v(c