[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; 10G}{
} rK@8/?y5
int i1=l; x5|I
int i2=mid+1; ;PF`Wj
for(int cur=l;cur<=r;cur++){ q YC;cKv
if(i1==mid+1) >Y&N8PHD
data[cur]=temp[i2++]; 6 +Sxr
else if(i2>r) GSY(
data[cur]=temp[i1++]; N@;?CKU
else if(temp[i1] data[cur]=temp[i1++]; =4vy@7/
else heltgRt
data[cur]=temp[i2++]; ~<P 0]ju
} qsF<!'m7`
} o=u3&liBi
G !<Z.]
} PUz*!9HC
/Y*WBTV'
改进后的归并排序: D_?K"E=fw
];}Wfl
package org.rut.util.algorithm.support; .v]IJfRH*
'QG xd!4
import org.rut.util.algorithm.SortUtil; x9NEFtqjm
y6@0O%TDN
/** h~A/y!s
* @author treeroot ylUb9KusOx
* @since 2006-2-2 rjl`&POqc
* @version 1.0 MtM%{=&_
*/ 'z );
public class ImprovedMergeSort implements SortUtil.Sort { 2;xIL]
OHv[#xGuV?
private static final int THRESHOLD = 10; Pl(Q,e7O]
z_g~
/* 909?_v
* (non-Javadoc) c@YI;HS_g
* y@]_+2Vo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6L:x^bM
*/ zFfoqb#*g
public void sort(int[] data) { s.EI`*xylY
int[] temp=new int[data.length]; U6=..K!q
mergeSort(data,temp,0,data.length-1); kTKq/G,Ft
} }{M#EP8q+
eeIhed9
private void mergeSort(int[] data, int[] temp, int l, int r) { U2$d%8G
int i, j, k; \Fl+\?~D
int mid = (l + r) / 2; 6Vww;1J
if (l == r) :d3bt~b'
return; EQ2#/>
if ((mid - l) >= THRESHOLD) 3WN`y8l
mergeSort(data, temp, l, mid); _a_7,bk5
else 4B=2>k
insertSort(data, l, mid - l + 1); Yj%U >),8
if ((r - mid) > THRESHOLD) EJ@?h(O
mergeSort(data, temp, mid + 1, r); lT4Hn;tnN
else ygOd69
insertSort(data, mid + 1, r - mid); d#6`&MR
AoY-\E
for (i = l; i <= mid; i++) { `))\}C@k
temp = data; ! N|0x`
} .id)VF-l
for (j = 1; j <= r - mid; j++) { t'9*R7=
temp[r - j + 1] = data[j + mid]; ]e>RK'
} >tTj[cMJl
int a = temp[l]; Tskq)NU
int b = temp[r]; VQY&g;[d
for (i = l, j = r, k = l; k <= r; k++) { CQwL|$)]Y
if (a < b) { Zkx[[gzL
data[k] = temp[i++]; |\_^B
a = temp; OF%B[h&
} else { )=\#UE+W
data[k] = temp[j--]; x??pBhJH
b = temp[j]; +${D
} Wf>zDW^"R
} Sa\!*e_sN
} :*t"8;O[
yvgrIdEP
/** ;WgJ<&33
* @param data i.=w]S j
* @param l z?>D_NLX6
* @param i @lCJ G!u
*/ 76>7=#m0u'
private void insertSort(int[] data, int start, int len) { V<D.sd<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wtmB+:I
} U`,0]"Qk
} $p#%G#T
} ^F2b hXE
} I+Jm>XN
)>b.;
堆排序： >RPd$('T
7a#4tqM#
package org.rut.util.algorithm.support; ZeUvyIG
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import org.rut.util.algorithm.SortUtil; 1^_U;O:I
w$H^q !(
/** b3S.-W{p.
* @author treeroot rSxxH]-
* @since 2006-2-2 F.-R r
* @version 1.0 g8Q5m=O*
*/ ebS0qo[oLH
public class HeapSort implements SortUtil.Sort{ ixW@7m
-od!J\KCy
/* (non-Javadoc) [01.\eh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TT50(_8
*/ &LF` W
public void sort(int[] data) { chV9_(8
MaxHeap h=new MaxHeap(); T<JwD[(
h.init(data); U7!.,kR-
for(int i=0;i h.remove(); vo\fUT@k
System.arraycopy(h.queue,1,data,0,data.length); Vw#_68EybM
} /" ${$b{
b !%hH
private static class MaxHeap{ ME;n^y\8
Q:|l`*.R
void init(int[] data){ GuGOePV
this.queue=new int[data.length+1]; 28/ ADZ
for(int i=0;i queue[++size]=data; lc2i`MC
fixUp(size); JYrY[',u
} ZDD..j
} PqyA1
A a=u+
private int size=0; !/^-;o7
Aub]IO~
private int[] queue; UOGuqV-
6`0mta Q
public int get() { /,MJq#@K
return queue[1]; DUL4noq{
} %&->%U|'
`6[I^qG".
public void remove() { S#-wl2z
SortUtil.swap(queue,1,size--); ?Zc"C
fixDown(1); :Gu+m
} QV h4
file://fixdown i]=&
private void fixDown(int k) { xXY.AoO6
int j; (]RM6i7
while ((j = k << 1) <= size) { &-czStQ
if (j < size %26amp;%26amp; queue[j] j++; U9&k;`
if (queue[k]>queue[j]) file://不用交换 A%Xt|=^_
break; RrhT'':[
SortUtil.swap(queue,j,k); op"$E1+
k = j; h'i{&mS_b
} ]l@ qra
} iweD @b
private void fixUp(int k) { T1`|~Z?g-
while (k > 1) { { F'Kk\f%:
int j = k >> 1; ]Ni;w]KE
if (queue[j]>queue[k]) c(U
break; F$Ca;cP"
SortUtil.swap(queue,j,k); -UZ@G~K
k = j; ;uqx@sx ;
} uK("<u|
} F( Ak
B-*E:O0y
} WKpA|
dl5=q\1=
} >tG+?Y'{
uNHdpni
SortUtil： z305{B:Y
=39 ?:VoD
package org.rut.util.algorithm; iB1i/l
/<&h@$NHH4
import org.rut.util.algorithm.support.BubbleSort; x1gx$P
import org.rut.util.algorithm.support.HeapSort; `_5GG3@Ff
import org.rut.util.algorithm.support.ImprovedMergeSort; J9%@VZut
import org.rut.util.algorithm.support.ImprovedQuickSort; 3Db3xN
import org.rut.util.algorithm.support.InsertSort; a=xT(G0Re
import org.rut.util.algorithm.support.MergeSort; #.5vC5
import org.rut.util.algorithm.support.QuickSort; xMs]Hs
import org.rut.util.algorithm.support.SelectionSort; s$DrR
import org.rut.util.algorithm.support.ShellSort; B|%tE{F
1ndJ+H0H
/** p T[gdhc
* @author treeroot 4'Xgk8)
* @since 2006-2-2 `@`1pOb
* @version 1.0 /}5B&TZ=(3
*/ .5> 20\b2
public class SortUtil { b-@\R\T
public final static int INSERT = 1; cPn+<M#
public final static int BUBBLE = 2; YCy22@C
public final static int SELECTION = 3; !EF(*~r!9L
public final static int SHELL = 4; d"~(T:=r
public final static int QUICK = 5; C+K=[
public final static int IMPROVED_QUICK = 6; ~2uh'e3
public final static int MERGE = 7; 9l+{OA
public final static int IMPROVED_MERGE = 8; ~^N]yb
public final static int HEAP = 9; wH"kk4^
Q;h3v1GC\P
public static void sort(int[] data) { :Gh~fm3}
sort(data, IMPROVED_QUICK); C:\(~D*GS
} :a3LS|W
private static String[] name={ uD>z@J-v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vt]F U<
}; ^m7~:=K7WG
Vm8D"I5i
private static Sort[] impl=new Sort[]{ h3Fo-]0
new InsertSort(), MonS hIz
new BubbleSort(), S7n"3.k
new SelectionSort(), ^[-> )
new ShellSort(), <%bw/
new QuickSort(), `Y3(~~YGn
new ImprovedQuickSort(), BIWD/|LQ
new MergeSort(), `1p 8C%
new ImprovedMergeSort(), fk5XvL
new HeapSort() K5ZnS`c;
}; D\]&8w6&
C|z%P}u#p
public static String toString(int algorithm){ K5 vNhA
return name[algorithm-1]; :%_q[}e
} R]b! $6Lt
&v#`t~
public static void sort(int[] data, int algorithm) { T!( 4QRh[
impl[algorithm-1].sort(data); }.%s xw
} BpT"~4oV5
gOE_ ]
public static interface Sort { rveVCTbC
public void sort(int[] data); !p%@Deu
} Y">4Qx4W
Uu2N9.5
public static void swap(int[] data, int i, int j) { k\(4sY M
int temp = data; |Is'-g!
data = data[j]; aR(E7mXQ
data[j] = temp; _Y YP4lEL
} Xu<FDjr
} ABWb>EZ8