[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; ua$H"(#c
} zJ;K4)"j
int i1=l; >7@kwj-f)
int i2=mid+1; f:$LVpXS-
for(int cur=l;cur<=r;cur++){ _?UW,5=O
if(i1==mid+1) eL)* K>T
data[cur]=temp[i2++]; kOfq6[JC
else if(i2>r) zqEMR>px
data[cur]=temp[i1++]; mNcoR^(VN
else if(temp[i1] data[cur]=temp[i1++]; mKWfRx*UdG
else J?/.|Y]e
data[cur]=temp[i2++]; p^^Ai
} rEI]{?eoF
} @8zp(1.
"=~P&Mi_
} jO'+r'2B9
V,,/}f'
改进后的归并排序: k~|nU
F8*e
package org.rut.util.algorithm.support; **\BP,]}
V>#iR>w_4,
import org.rut.util.algorithm.SortUtil; u3{gX{so
ciKkazx.
/** Lo,z7"8
* @author treeroot 8+^?<FKa
* @since 2006-2-2 F|._'i+B!
* @version 1.0 1VW;[ ocQ
*/ X|.M9zIx
public class ImprovedMergeSort implements SortUtil.Sort { x<)%Gs}tb
DJl06-s V
private static final int THRESHOLD = 10; W":is"
[BS3y`c
/* m35Blg34
* (non-Javadoc) j7;v'eA`;7
* VdpkE0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qy ; M:q
*/ OHnHSb'?\
public void sort(int[] data) { oOk.Fq
int[] temp=new int[data.length]; a,Gd\.D
mergeSort(data,temp,0,data.length-1); o l67x
} G9\Bi-'ul
:"ZH
private void mergeSort(int[] data, int[] temp, int l, int r) { p},6W,f
int i, j, k; qB3{65
int mid = (l + r) / 2; m{={a5GD
if (l == r) W5-p0,?[6
return; 9H*$3
if ((mid - l) >= THRESHOLD) HtOo*\Ne
mergeSort(data, temp, l, mid); _I_Sq,Z#
else ]B>Y +
insertSort(data, l, mid - l + 1); $Aww5G5e
if ((r - mid) > THRESHOLD) Egt;Bj#%
mergeSort(data, temp, mid + 1, r); sm}q&m]ad
else W|=?-
insertSort(data, mid + 1, r - mid); .<v0y"amJ
U{D ?1tF
for (i = l; i <= mid; i++) { [!{*)4$6
temp = data; 84P^7[YX>
} Kzxzz6R?
for (j = 1; j <= r - mid; j++) { '{kNXCnZ
temp[r - j + 1] = data[j + mid]; ~Dr/+h:^\
} !U#kUj:4I
int a = temp[l]; !mpRLBH
int b = temp[r]; Ze~ a+%Sb
for (i = l, j = r, k = l; k <= r; k++) { MxxYMR
if (a < b) { _jef{j
data[k] = temp[i++]; zsI0Q47\
a = temp; oUZwZ_yKW
} else { 5(>m=ef"
data[k] = temp[j--]; r6]r+!63"
b = temp[j]; fl~k')s
} _6qf>=qQ`"
} TEB%y9
} p<'mc|hGq
;: Hfkyy]
/** 'jcDfv(v<
* @param data pw:<a2.
* @param l 1*?IDYB
* @param i t=S94^g
*/ Y,WcHE
private void insertSort(int[] data, int start, int len) { i>T{s-3v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EBw}/y{Kt
} {^9,Dy_D
} s;}';#
} "eI-Y`O,
} ?`\<t$M
-+|0LXo
堆排序： /.05rTpp
F.?:Gd1
package org.rut.util.algorithm.support; _w+sx5
Q(AOKp,F
import org.rut.util.algorithm.SortUtil; (h/v"dV;
,k{{ZP P
/** h'UWf"d
* @author treeroot FlVGi3
* @since 2006-2-2 K]@6&H-b|
* @version 1.0 peGXU/5.I
*/ ReKnvF~
public class HeapSort implements SortUtil.Sort{ (' `) m
+qpD>5#
/* (non-Javadoc) ICq;jfML
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Dr(.|)hv[&
*/ !SiZA"
public void sort(int[] data) { }M'\s
MaxHeap h=new MaxHeap(); s26s:A3rh
h.init(data); Ofqe+C
for(int i=0;i h.remove(); ?ZlwRjB\
System.arraycopy(h.queue,1,data,0,data.length); U <4<8'
} }}t"^ms
/;HytFP
private static class MaxHeap{ zd#qBj]g
Vl^jTX5N
void init(int[] data){ s.zH.q,
this.queue=new int[data.length+1]; Y0|~]J(B
for(int i=0;i queue[++size]=data; w^R5/#F_r
fixUp(size); X:8=jHkz
} (O&~*7D*
} pPQ]#v
5Odi\SJ&
private int size=0; RG*Nw6A
Ta/G
private int[] queue; ,Hys9I
\,p)
public int get() { j nI)n*
return queue[1]; L>@0Nne7
} -iH/~a
ml?+JbLg0
public void remove() { A*\4C3a'%
SortUtil.swap(queue,1,size--); X$JKEW;0BP
fixDown(1); )}WG`
} ?1PY]KNaK
file://fixdown )- 2^Jvc
private void fixDown(int k) { /#>?wy<s~
int j; [&FMVM`
while ((j = k << 1) <= size) { @ULr)&9
if (j < size %26amp;%26amp; queue[j] j++; [FyE{NfiJ%
if (queue[k]>queue[j]) file://不用交换 7;|6g8=
break; vj{h*~
SortUtil.swap(queue,j,k); zI7-xqZ
k = j; {Qw,L;R
} 0JNG\ARC
} .P,\69g~A
private void fixUp(int k) { 9^ mrsj
while (k > 1) { AFMAgf{bD
int j = k >> 1; zhN'@Wj'_
if (queue[j]>queue[k]) fWKv3S1dT
break; 5[/*UtB
SortUtil.swap(queue,j,k); R_@yj]%H=
k = j; $fnFi|-
} zyCl`r[}
} H3a}`3}U
JN3Oe5yB2@
} fep#Kb%"e
)*s.AFu]7x
} 7J>n;8{%?
`?Y/:4
SortUtil： CiPD+I
pazFVzT
package org.rut.util.algorithm; -} Z
"2=v?,'t
import org.rut.util.algorithm.support.BubbleSort; #;^.&2Lt
import org.rut.util.algorithm.support.HeapSort; l|N1u=Z
import org.rut.util.algorithm.support.ImprovedMergeSort; ,GR(y^S
import org.rut.util.algorithm.support.ImprovedQuickSort; RqcX_x(p
import org.rut.util.algorithm.support.InsertSort; Wb*d`hzQ}
import org.rut.util.algorithm.support.MergeSort; -4hX-
import org.rut.util.algorithm.support.QuickSort; %W`pTvF
import org.rut.util.algorithm.support.SelectionSort; V (X)Qu@R
import org.rut.util.algorithm.support.ShellSort; c]xpp;%]
?}lCS7&
/** vx-u+/\
* @author treeroot ]Fjz+CGg
* @since 2006-2-2 jRq>Sz{8
* @version 1.0 QiwZk<rb
*/ =<33(
public class SortUtil { y4envjl0
public final static int INSERT = 1; OwDjUKeN
public final static int BUBBLE = 2; Txw,B2e)>
public final static int SELECTION = 3; KN+*_L-
public final static int SHELL = 4; x$M[/ID0
public final static int QUICK = 5; e@X~F6nP
public final static int IMPROVED_QUICK = 6; |4-Ey! P
public final static int MERGE = 7; L!e@T'
public final static int IMPROVED_MERGE = 8; Z"E+ TX
public final static int HEAP = 9; y8,es$
v_G4:tY
public static void sort(int[] data) { flmcY7ZV
sort(data, IMPROVED_QUICK); z2,rnm)Q
} iOD9lR`s
private static String[] name={ 2poU\|H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (1TYJ. Z
}; !0zM@p
s]=kD
private static Sort[] impl=new Sort[]{ =zbrXtp,
new InsertSort(), 6o6m"6
new BubbleSort(), U;{VL!
new SelectionSort(), T`vj6F
new ShellSort(), -|ee=BV
new QuickSort(), K,^b=_]
new ImprovedQuickSort(), $Y ]*v)}X
new MergeSort(), <Ojf&C^Z
new ImprovedMergeSort(), [%3{mAd
new HeapSort() ,',fO?Qv'
}; |NM.-@1
>0~y"~M
public static String toString(int algorithm){ 0ED(e1K#B
return name[algorithm-1]; &Cdd
} Ho\z^w+T`
m4kmJaM
public static void sort(int[] data, int algorithm) { w+ _'BU1#
impl[algorithm-1].sort(data); B%r)~?6DM
} #>!!#e!*
,"*[T\u
public static interface Sort { !q$IB?8
public void sort(int[] data); Yz{UP)TC
} `)SkA?yKI
|E!xt6B
public static void swap(int[] data, int i, int j) { TNiFl hq
int temp = data; 0R*!o\y
data = data[j]; I,q3J1K
data[j] = temp; *jDzh;H!w
} jQ`cfE$sV
} N!HiQ