[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; p*A//^wQ
} Dl6zl6q?
int i1=l; 1|CO>)*D
int i2=mid+1; je\UfEo%
for(int cur=l;cur<=r;cur++){ (ol 3vt
if(i1==mid+1) l|9`22G
data[cur]=temp[i2++]; QH:i)v*
else if(i2>r) ~Tolz H!
data[cur]=temp[i1++]; ;$]R#1i44
else if(temp[i1] data[cur]=temp[i1++]; WxdYvmp6z[
else ;H.r6
data[cur]=temp[i2++]; `SWK(='
} ^+&}:9Ml
} FMiYZ1^r
wqsnyP/m
} WJWhx4Hk
'|.u*M,b
改进后的归并排序: Zzs pE}
1Mqz+@~11
package org.rut.util.algorithm.support; GS@ wG
+8"H%#~
import org.rut.util.algorithm.SortUtil; h#>67gJV
JaEyVe
/** 8dfx _kY`/
* @author treeroot 3:RZ@~u=
* @since 2006-2-2 iC">F.9#
* @version 1.0 6|9fcIh]B
*/ dc*#?G6^
public class ImprovedMergeSort implements SortUtil.Sort { UNJ|J$T]
<?eZ9eB
private static final int THRESHOLD = 10; 4*]`s|fbu
;lldxS
/* >:Ec
* (non-Javadoc) -J:vYhq|g
* &o(? }W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %3cBhv[q4
*/ gi8kYHldH
public void sort(int[] data) { }-kb"\X%g
int[] temp=new int[data.length]; hH~Z hB
mergeSort(data,temp,0,data.length-1); 7)YU ;
} EC7o 3LoND
rmhB!Lo
private void mergeSort(int[] data, int[] temp, int l, int r) { ;X>KP,/r$
int i, j, k; /D~:Ufw
int mid = (l + r) / 2; Vs(;al'
if (l == r) yl*S|= 8;k
return; U i;o/Z3
if ((mid - l) >= THRESHOLD) 6Dch+*4*@
mergeSort(data, temp, l, mid); >13=4S
else } ?
insertSort(data, l, mid - l + 1); :98Pe6
if ((r - mid) > THRESHOLD) >2$M~to"1
mergeSort(data, temp, mid + 1, r); /3fo=7G6
else *E>YLkg]
insertSort(data, mid + 1, r - mid); [Gu]p&
=i.[|g"
for (i = l; i <= mid; i++) { GlaWBF#
temp = data; ?tOzhrv
} ;2$^=:8
for (j = 1; j <= r - mid; j++) { ky*-_
temp[r - j + 1] = data[j + mid]; #nnP.t m
} @|M10r9E
int a = temp[l]; G$q=WM!%#s
int b = temp[r]; H7WKnn@
for (i = l, j = r, k = l; k <= r; k++) { r$+9grm<
if (a < b) { b'G4KNW
data[k] = temp[i++]; V9+7A
a = temp; }b44^iL$9y
} else { tNtP+v-{
data[k] = temp[j--]; X|b~,X%N
b = temp[j]; FT=w`NE,+
} StE4n0V
} sUA)I%Q!
} om(#P5cSM;
1m&(3%#{
/** UrgvG, Lt
* @param data }/6jom9U?
* @param l ~-,<`VY
* @param i -Q,lUP
*/ ,Ti#g8j
private void insertSort(int[] data, int start, int len) { .NabK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U7Ps2~x3
} \KG{ 11
} atYm.qb
} K@hv[4
} ")TI,a`
)y8$-"D(it
堆排序： Hkpn/,D5
U,/>p=s
package org.rut.util.algorithm.support; yNO5h]o
Y40{v(Pi
import org.rut.util.algorithm.SortUtil; =oSv=xY
%lvSO/F+
/** hhwV)Z
* @author treeroot d6_ CsqV
* @since 2006-2-2 F3+)bIz
* @version 1.0 `w&|~xT
*/ *@/!h2
public class HeapSort implements SortUtil.Sort{ m]V5}-?al
!Y5O3^I=u
/* (non-Javadoc) wAITE|H<zj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B4I|"5G2y
*/ gXG1w>
public void sort(int[] data) { IF uz'
MaxHeap h=new MaxHeap(); Z$T1nm%lo:
h.init(data); ;]|Z8#s
for(int i=0;i h.remove(); D=e&"V a
System.arraycopy(h.queue,1,data,0,data.length); TfMuQi'>
} op[5]tjL
KyDQ<Dq&
private static class MaxHeap{ =6/0=a[
r..\(r
void init(int[] data){ %U'YOE6
this.queue=new int[data.length+1]; b{9q
for(int i=0;i queue[++size]=data; m39 `f,M
fixUp(size); >Efv?8$E\
} R}BHRmSQ
} 'AHI;Z~Gk
TR]~r2z
private int size=0; 'Exj|Y&
u=A&n6Q[Vo
private int[] queue; MAhcwmZNy
J-hP4t&x
public int get() { T0v;8Ee
return queue[1]; u3Ua>A-
} {3'z}q
_"=Yj3?G%
public void remove() { x?T/=C
SortUtil.swap(queue,1,size--); 1)vdM(y3j
fixDown(1); wS#.Wzp.w
} nxCwg>
file://fixdown rk{DrbRx
private void fixDown(int k) { <1>\?$)D
int j; yX?& K}JI
while ((j = k << 1) <= size) { RD<l<+C^~
if (j < size %26amp;%26amp; queue[j] j++; GAV|x]R
if (queue[k]>queue[j]) file://不用交换 /`3<@{D
break; j$a,93P5
SortUtil.swap(queue,j,k); Ar N*9
k = j; a6fMx~
} 8v_HIx0xu
} \_qiUvPf\
private void fixUp(int k) { k~h'`(
while (k > 1) { A2!7a}*1(
int j = k >> 1; \-gZ_>)
if (queue[j]>queue[k]) 1W;q(#q
break; `A])4q$
SortUtil.swap(queue,j,k); j!xt&t4D
k = j; j-ZKEA{:1
} I HgYgn
} 5Jlz$]f
tUH#%
} Y]Td+Zi
+2!F6"hP
} W/OZ}ky}^
'/G.^Zl9
SortUtil： wz<YflF
+v{<<
package org.rut.util.algorithm; @;!s"!~sv
"JT R5;`w
import org.rut.util.algorithm.support.BubbleSort; ggIz)</
import org.rut.util.algorithm.support.HeapSort; uAwT)km {
import org.rut.util.algorithm.support.ImprovedMergeSort; );'8*e'
import org.rut.util.algorithm.support.ImprovedQuickSort; _0<qS{RW
import org.rut.util.algorithm.support.InsertSort; XOAZ
import org.rut.util.algorithm.support.MergeSort; .A//Q|ot!
import org.rut.util.algorithm.support.QuickSort; <:fjWy
import org.rut.util.algorithm.support.SelectionSort; dnSjXyjFB
import org.rut.util.algorithm.support.ShellSort; [RTB|0Q
AtGk _tpVZ
/** JL=MlZ
* @author treeroot k.NgE/;3
* @since 2006-2-2 J*IC&jH:
* @version 1.0 VnAJOR7lrx
*/ tT>~;l%'
public class SortUtil { 8&\<p7}=h
public final static int INSERT = 1; e?rp$kq7
public final static int BUBBLE = 2; nJ<h}*[
public final static int SELECTION = 3; >r6`bh [4
public final static int SHELL = 4; 2&S*> (
public final static int QUICK = 5; n(\5Z&
public final static int IMPROVED_QUICK = 6; X!KjRP\\
public final static int MERGE = 7; sluR@[l
public final static int IMPROVED_MERGE = 8; -Zh`h8gX
public final static int HEAP = 9; c$ya{]a
ov.7FZ+
public static void sort(int[] data) { 6&5p3G{%0
sort(data, IMPROVED_QUICK); I4.^I/c(
} 5B)Z@-x2
private static String[] name={ I@76ABu^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p)NhV
}; WLqwntzk
%{Ez0XwGCn
private static Sort[] impl=new Sort[]{ S7vT=
new InsertSort(), df;-E
new BubbleSort(), uU=O0?'zq
new SelectionSort(), a*@ 6G
new ShellSort(), f^z/s6I0
new QuickSort(), S4508l
new ImprovedQuickSort(), YtI2Vr/9
new MergeSort(), W7r1!/ccj
new ImprovedMergeSort(), dt%waM!
new HeapSort() 3C{3"bP
}; @=B'<&g$Xv
)>abB?RZ
public static String toString(int algorithm){ :yO.Te F
return name[algorithm-1]; u^&2T(xGi
} ve;#o<
a/Z >-
public static void sort(int[] data, int algorithm) { }c?/-ab>
impl[algorithm-1].sort(data); #&a-m,Y$sx
} 9&a&O Z{
k\rzvo=U
public static interface Sort { Rl@k~;VV
public void sort(int[] data); xrd@GTaI
} {W*_^>;K
H.cN(7LXm
public static void swap(int[] data, int i, int j) { G41 gil6k
int temp = data; [9| 8p$
data = data[j]; AdMA|!|:hc
data[j] = temp; \}[{q
} sJu^deX
} Ad!= *n