[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; |J$A%27
} Dri6\/0
int i1=l; ;-db/$O
int i2=mid+1; TTf j5
for(int cur=l;cur<=r;cur++){ wL;OQhI
if(i1==mid+1) Fh~9(Y#
data[cur]=temp[i2++]; Agcss20.
else if(i2>r) c`E>7Hjr-
data[cur]=temp[i1++]; #MC#K{Xd
else if(temp[i1] data[cur]=temp[i1++]; &;Ncc,jb
else O,$*`RZpx
data[cur]=temp[i2++]; z#{Y>.b
} FZ*"^=)`G
} " ityx?
l\_!oa~
} ?1Nz ,Lc$
kQ\GVI11?
改进后的归并排序: ]TvMT
j.M]F/j
package org.rut.util.algorithm.support; V&zeC/xSq
oodA&0{)d
import org.rut.util.algorithm.SortUtil; 6 AO(A *
2;)IBvK
/** /xn|d#4
* @author treeroot 2> a&m>
* @since 2006-2-2 ,xwiJfG; ]
* @version 1.0 #X(2
*/ 1P)K@j
public class ImprovedMergeSort implements SortUtil.Sort { pH~\~
%1&X+s3
private static final int THRESHOLD = 10; G^'We6<
g;l K34{
/* kNuvJ/St
* (non-Javadoc) ^-%'ItVO
* 8vx ca]DcV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "6,fIsU
*/ \8(Je"S
public void sort(int[] data) { 1^_W[+<S/
int[] temp=new int[data.length]; >~g-
mergeSort(data,temp,0,data.length-1); %!` %21
} ,[n9DPZ
PqspoH 0OI
private void mergeSort(int[] data, int[] temp, int l, int r) { enk`I$Xx
int i, j, k; ch#)XomN
int mid = (l + r) / 2; 3MQHoxX
if (l == r) FH</[7f;@N
return; _'p/8K5)=
if ((mid - l) >= THRESHOLD) =CzGI|pb
mergeSort(data, temp, l, mid); :k9T`Aa]
else <?41-p-;
insertSort(data, l, mid - l + 1); +G;<D@gSa0
if ((r - mid) > THRESHOLD) h-p}Qil,
mergeSort(data, temp, mid + 1, r); _DR@P(0>_
else ^"Bhp:o2
insertSort(data, mid + 1, r - mid); BOpZ8p'eH1
:ok.[q
for (i = l; i <= mid; i++) { II'.vp
temp = data; fhi}x(
} ?0)K[Kd'Y
for (j = 1; j <= r - mid; j++) { 4(8c L?J`0
temp[r - j + 1] = data[j + mid]; UDHOcb
} :1d;jx>
int a = temp[l]; <gPM/4$G
int b = temp[r]; k7uX!}
for (i = l, j = r, k = l; k <= r; k++) { ~,,r\Y+
if (a < b) { rDl/R^w"
data[k] = temp[i++]; ll__A|JQ
a = temp; Up Z 9g"
} else { E}Cz(5
data[k] = temp[j--]; s<*+=aIfu
b = temp[j]; we}xGb.u
} v:lkvMq|=
} ",apO
} V;^-EWNj
+<$(ez
/** X$xf@|<a
* @param data G!%m~+",
* @param l n)N!6u
* @param i ,wf_o%'eW
*/ x,: k/]
private void insertSort(int[] data, int start, int len) { Ztk%uc8_lM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r@JMf)a]
} Zzlt^#KLx
} =lv(
} *BxU5)O
} ; &rxwL
1GA.c:
堆排序： !- [ZQ
z<Z0/a2'1
package org.rut.util.algorithm.support; J"#6m&R_q
)P?0YC
import org.rut.util.algorithm.SortUtil; ?121 as}z
'7' 73
/** <Z[Z&^
* @author treeroot 8K^#$,.."
* @since 2006-2-2 xlcCL?qQj
* @version 1.0 -qpvVLR,
*/ HM(X8iNt
public class HeapSort implements SortUtil.Sort{ ju:}%'
/1TK+E$
/* (non-Javadoc) `D3q!e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M*'8$|Z
*/ gHgqElr(
public void sort(int[] data) { C{U*{0}
MaxHeap h=new MaxHeap(); '`tFZfT
h.init(data); W+Piqf*
for(int i=0;i h.remove(); 6r^ZMW
System.arraycopy(h.queue,1,data,0,data.length); o>*`wv
} FoE}j
%cs"PS
private static class MaxHeap{ J3+qnT8X
Vuy%7H
void init(int[] data){ t(<k4ji,
this.queue=new int[data.length+1]; /?BTET
for(int i=0;i queue[++size]=data; IUAe6
fixUp(size); !C4)P3k
} AW;xlY= g
} Sc3{Y+g
8\nka5
private int size=0; :bo2H[U+
3hkEjR
private int[] queue; r}Vr_
dm[JDVv|
public int get() { Ce//;Op
return queue[1]; j*?E~M.'1K
} bs}SFTL
EId>%0s5
public void remove() { f*V^HfiQb
SortUtil.swap(queue,1,size--); RK*tZ
fixDown(1); EWl9rF@I
} ">B&dNrt
file://fixdown s o: o b}
private void fixDown(int k) { }.u[';q]S
int j; E690'\)31
while ((j = k << 1) <= size) { 3p-SpUvp
if (j < size %26amp;%26amp; queue[j] j++; .: wg@Z
if (queue[k]>queue[j]) file://不用交换 rD6NUS
break; 8xj_)=(sV!
SortUtil.swap(queue,j,k); )4ok@^.
k = j; { zL4dJw
} F:Vl\YZ
} , iEGf-!k
private void fixUp(int k) { 8~!h8bkC
while (k > 1) { dr8Q>(ZY
int j = k >> 1; %U<lS.i
if (queue[j]>queue[k]) >!PM5%G
break; mE+=H]`.p
SortUtil.swap(queue,j,k); PMiu "
k = j; ?mi}S${g
} `&)
} 7lOAu]Zx
Q=<&ew
} u3cg&lEgT
0/fwAp
} *Qngx
%YuFw|wO
SortUtil： 0m4#{^Y
g5nL7;`N
package org.rut.util.algorithm; Vs>e"czfm/
EE9eG31|r
import org.rut.util.algorithm.support.BubbleSort; ?+c-m+;wj
import org.rut.util.algorithm.support.HeapSort; JBV 06T_4o
import org.rut.util.algorithm.support.ImprovedMergeSort; G]-\$>5R
import org.rut.util.algorithm.support.ImprovedQuickSort; .F/l$4CQ
import org.rut.util.algorithm.support.InsertSort; I_c?Ky8J_|
import org.rut.util.algorithm.support.MergeSort; Q>z(!'dw
import org.rut.util.algorithm.support.QuickSort; (-o}'l'mo
import org.rut.util.algorithm.support.SelectionSort; 1mv5B t
import org.rut.util.algorithm.support.ShellSort; fTy{`}>
pm}_\_
/** 1[Q~&QC
* @author treeroot W$}2 $}r0U
* @since 2006-2-2 9y\Ik/
* @version 1.0 ?Rh[S
*/ M(} T\R
public class SortUtil { +>tSO!}[
public final static int INSERT = 1; $?&distJ
public final static int BUBBLE = 2; !(_qM
public final static int SELECTION = 3; r-hb]!t
public final static int SHELL = 4; nS!m1&DeD
public final static int QUICK = 5; >)`*:_{
public final static int IMPROVED_QUICK = 6; KrTlzbw&p\
public final static int MERGE = 7; .%\R L/
public final static int IMPROVED_MERGE = 8; $-]9/Ct
public final static int HEAP = 9; Fe2iG-ec
8P%Jky&(
public static void sort(int[] data) { EBmkKiI;
sort(data, IMPROVED_QUICK); ?;rRR48T9E
} 9:!V":8q
private static String[] name={ >(gbUW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B.?@VF
}; P!R`b9_U
H/0b3I^
private static Sort[] impl=new Sort[]{ |i(@1 l
new InsertSort(), 9]S;%:64
new BubbleSort(), 8[)"+IFN
new SelectionSort(), 9*a"^
new ShellSort(), oC TSV
new QuickSort(), LD;! s
new ImprovedQuickSort(), Q-e(>=Gv_
new MergeSort(), |pT[ZT|}G
new ImprovedMergeSort(), @ +>>TGC
new HeapSort() nI`9|W
}; 5N#Sic M
(]"`>,ray
public static String toString(int algorithm){ >)F)@KAuN4
return name[algorithm-1]; [WR*u\FF
} V4<f4|IL
"6WE6zq
public static void sort(int[] data, int algorithm) { &7w*=f8I
impl[algorithm-1].sort(data); }vX1@n7T6
} <a(739IF
[TmZ\t!5$
public static interface Sort { `$] ZT>&
public void sort(int[] data); \uOR1z
} _BND{MsX
NE?tfj
public static void swap(int[] data, int i, int j) { fc^d3wH0L
int temp = data; hIo^/_K
data = data[j]; DPWnvd
data[j] = temp; )5<c8lzp
} IP#qT `=}
} <[z9*Tm