[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; HN NeH;L
} ? bWc<]
int i1=l; k8}fKVU;
int i2=mid+1; ASoBa&vX
for(int cur=l;cur<=r;cur++){ p1niS:}j
if(i1==mid+1) e_epuki
data[cur]=temp[i2++]; ZrEou}z(*
else if(i2>r) 153*b^iDBh
data[cur]=temp[i1++]; 18%$Z$K,
else if(temp[i1] data[cur]=temp[i1++]; seK;TQ3/7
else 8Gy]nD
data[cur]=temp[i2++]; @4*eH\3
} vzI>:Bf
} i=n;rT
liPrxuP`
} L@[}sMdq(
V)~b+D
改进后的归并排序: Z1q<) O1QX
!%t@wQ]\hG
package org.rut.util.algorithm.support; `;}qjm0a
nw/g[/<;
import org.rut.util.algorithm.SortUtil; Zc_F"KJL
6/wC StZ
/** oe^JDb#
* @author treeroot n Yx[9HN
* @since 2006-2-2 `Z>=5:+G@2
* @version 1.0 F%y#)53g
*/ :* |WE29U
public class ImprovedMergeSort implements SortUtil.Sort { =3'B$PY
Szu@{lpP@
private static final int THRESHOLD = 10; 8v4krz<Iq
igTs[q=Ak
/* ^E\4`
* (non-Javadoc) a] c03$fK
* ,/p+#|>C=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ou4hAm91s
*/ ,ov$`v
public void sort(int[] data) { OjffN'a+N
int[] temp=new int[data.length]; -:_3N2U=+
mergeSort(data,temp,0,data.length-1); b)Nd}6}<?
} Z:h'kgG&
*^[6uaa
private void mergeSort(int[] data, int[] temp, int l, int r) { a+v.(mCG
int i, j, k; sSKD"
int mid = (l + r) / 2; )UU`uzU;u
if (l == r) B=W#eu <1
return; 3'L =S
if ((mid - l) >= THRESHOLD) :dipk,b?n
mergeSort(data, temp, l, mid); mm#UaEp
else |4/rVj"
insertSort(data, l, mid - l + 1); rwSR
if ((r - mid) > THRESHOLD) /<T{g0s
mergeSort(data, temp, mid + 1, r); {Q$8p2W
else M<l<n$rYS
insertSort(data, mid + 1, r - mid); eVMnI yr
e`LvHU_0
for (i = l; i <= mid; i++) { %F150$(D
temp = data; \>oy2{=;'
} oc-&}R4=
for (j = 1; j <= r - mid; j++) { GJU(1%-
temp[r - j + 1] = data[j + mid]; a6h+?Q7uF
} `j'1V1
int a = temp[l]; |AExaO"jk
int b = temp[r]; k fY;
for (i = l, j = r, k = l; k <= r; k++) { Xajt][
if (a < b) { |ul{d|
data[k] = temp[i++]; % mPv1$FH
a = temp; ,\+N}F^
} else { Y<Ae_yLa
data[k] = temp[j--]; mmjWLrhlu
b = temp[j]; ?vWF[ DRd'
} _ j'm2BAO
} "usPzp5
} >f&L7@
TEer>gD:v
/** G,WLca[
* @param data nZYO}bv\
* @param l aEa.g.SZ
* @param i s4f{ziLp
*/ PpLhj
private void insertSort(int[] data, int start, int len) { Y>c+j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <M5fk?n,|
} w?*79 u
} 4k{xo~+%,
} Xep2)3k>
} _'y`hKeI[
^"iL|3d
堆排序： A[fTpS~~%
*e:I*L
package org.rut.util.algorithm.support; Fku<|1}&y
7NOF^/nU
import org.rut.util.algorithm.SortUtil; /i_FA]Go
qM3NQ8Rm
/** b$ 8R
* @author treeroot W%&s$b(
* @since 2006-2-2 EcytNYn
* @version 1.0 I%Z=O=
*/ !YO'u'4<aK
public class HeapSort implements SortUtil.Sort{ CO,{/
B )\;Ja
/* (non-Javadoc) qTWQ!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ur1kb{i
*/ `{IL.9M!f
public void sort(int[] data) { ' qT\I8%
MaxHeap h=new MaxHeap(); 9zx9t
h.init(data); p74Nd4U$s
for(int i=0;i h.remove(); |#xBC+
System.arraycopy(h.queue,1,data,0,data.length); 3H>\hZ
} G<rAM+B*g
Ue`Y>T7+!
private static class MaxHeap{ vaVV1
g%ys|
void init(int[] data){ ~-sG&u>
this.queue=new int[data.length+1]; Zv mkb%8
for(int i=0;i queue[++size]=data; ;5T}@4m|r
fixUp(size); yP` K [/
} QAl4w)F
} N<KsQsy=
`|92!Ej
private int size=0; )L":I
&Wdi 5T8
private int[] queue; !"E/6z2&(k
9G7Brs:
public int get() { Bz%wV-
return queue[1]; m9c`"!
} \fvm6$ rZ^
^rY18?XC+:
public void remove() { OYmutq
SortUtil.swap(queue,1,size--); ]70ZerQ~L
fixDown(1); ^,f^YL;
} ESFJN}Q%0.
file://fixdown v/vPU
private void fixDown(int k) { F]<2nb7
int j; 96; gzG@1!
while ((j = k << 1) <= size) { IQd~` G
if (j < size %26amp;%26amp; queue[j] j++; Tgla_sMb
if (queue[k]>queue[j]) file://不用交换 MU '-
break; {od@Sl
SortUtil.swap(queue,j,k); QWt3KW8)
k = j; Azr|cKu]
} d}|z+D
} T>hm\!
private void fixUp(int k) { QaA?UzB
while (k > 1) { 5xj8^W^G9
int j = k >> 1; "So"oT1
if (queue[j]>queue[k]) 4Xwb`?}-
break; nHZhP4W
SortUtil.swap(queue,j,k); E*,nKJu'r
k = j; 6u`$a&dR'l
} A|U0e`Iw
} nC?Lz1re
VT~%);.#
} (KPD`l8.
+`$$^x
} ])?h~
w~=xO_%
SortUtil： #IDLfQ5g
,S`FxJcE
package org.rut.util.algorithm; AG;KXL[V
eZhF<<Y
import org.rut.util.algorithm.support.BubbleSort; g"c7$
import org.rut.util.algorithm.support.HeapSort; 2BT+[
import org.rut.util.algorithm.support.ImprovedMergeSort; Gfy9YH~
import org.rut.util.algorithm.support.ImprovedQuickSort; CeUXGa|C
import org.rut.util.algorithm.support.InsertSort; :>H{?
import org.rut.util.algorithm.support.MergeSort; ug"4P.wI
import org.rut.util.algorithm.support.QuickSort; )7#3n(_np
import org.rut.util.algorithm.support.SelectionSort; qM2m!
import org.rut.util.algorithm.support.ShellSort; PJ<qqA`!
}1CvbB%,A
/** )1GJ^h$l
* @author treeroot |(,{&\
* @since 2006-2-2 =Uo*-EH
* @version 1.0 utn,`v
*/ 3rJ LLYR
public class SortUtil { MJH>rsTQ
public final static int INSERT = 1; ^Q+z^zlC
public final static int BUBBLE = 2; |942#rM
public final static int SELECTION = 3; 6g#E/{kQw
public final static int SHELL = 4; zF? 6"
public final static int QUICK = 5; ~RBa&Y=Mb
public final static int IMPROVED_QUICK = 6; ]ab q$Y'
public final static int MERGE = 7; W+4Bx=Mj
public final static int IMPROVED_MERGE = 8; (Gapv9R
public final static int HEAP = 9; VpY,@qh
J*6B~)Sp@
public static void sort(int[] data) { XgeUS;qtta
sort(data, IMPROVED_QUICK); 7xWJw
} `fG<iBD
private static String[] name={ :2wT)wz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *1:kIi7_
}; 7;r3Bxa Q
8$IUit h
private static Sort[] impl=new Sort[]{ Y~#F\v
new InsertSort(), >f1fvv6
new BubbleSort(), `JGW8 _
new SelectionSort(), %t74*cX
new ShellSort(), M[-/&;`f@
new QuickSort(), bB*cd!7y
new ImprovedQuickSort(), uGYH4
new MergeSort(), OI6m>XH?
new ImprovedMergeSort(), Y$./!lVY
new HeapSort() ^\\9B-MvY
}; =`CK`x
#i.BOQxS
public static String toString(int algorithm){ gt~u/Z%
return name[algorithm-1]; pQ4HX)<P
} ~[BGKqh
WZTv
public static void sort(int[] data, int algorithm) { '[_.mx|cd`
impl[algorithm-1].sort(data); FBzsM7]j
} `@u9 fx.
n%02,pC6,
public static interface Sort { N1x~-2(
public void sort(int[] data); zh(=kS`
} I9#l2<DYlX
t47;X}y f
public static void swap(int[] data, int i, int j) { \DD4=XGA
int temp = data; :gRVa=}=
data = data[j]; BmYX8j]
data[j] = temp; }%42Ty
} *#?9@0b@
} qn}VW0!