[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; KG-UW
} I,w^?o
int i1=l; p>!1S
int i2=mid+1; do*Wx2:R
for(int cur=l;cur<=r;cur++){ O2$!'!hz
if(i1==mid+1) _3I3AG0e
data[cur]=temp[i2++]; @X|ok*v`
else if(i2>r) <BQ%8}
data[cur]=temp[i1++]; %{Xm5#m
else if(temp[i1] data[cur]=temp[i1++]; Lq%[A*`^
else 65uZLsQ
data[cur]=temp[i2++]; [KD}U-(Wg
} M Ey1~h/
} @H3|u`6V
s~/57S
} ]m RF[b$
Fu#Y7)r
改进后的归并排序: +OKA_b"wB
1RmBtx\<
package org.rut.util.algorithm.support; dPRtN@3
z=u~]:.1O
import org.rut.util.algorithm.SortUtil; ^NcTWbs-T
$`ON!,oa
/** B>R* f C@g
* @author treeroot 20n%o&kG]8
* @since 2006-2-2 oUCS|
* @version 1.0 sek6+#|=
*/ h!ZZ2[
public class ImprovedMergeSort implements SortUtil.Sort { ER/\ +Z#Z
B>1M$3`E
private static final int THRESHOLD = 10; KX]-ll
R,uJK)m
/* Wnb)*pPP
* (non-Javadoc) <JGYr 4V
* H+nr5!`kz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z=0iPy,m>
*/ {|G&W^`
public void sort(int[] data) { )x y9X0
int[] temp=new int[data.length]; ?exALv'B
mergeSort(data,temp,0,data.length-1); cPx66Dh&
} K,Lr+
oC5gME"2
private void mergeSort(int[] data, int[] temp, int l, int r) { hU |LFjc
int i, j, k; 7&#'c8]/qh
int mid = (l + r) / 2; Ty)gPh6O
if (l == r) no eb f
return; 0m qSA
if ((mid - l) >= THRESHOLD) rHH#@Zx
mergeSort(data, temp, l, mid); ~4l6unCI
else goG]WGVr
insertSort(data, l, mid - l + 1); BASO$?jf4
if ((r - mid) > THRESHOLD) N)`tI0/W
mergeSort(data, temp, mid + 1, r); x*3@,GmZl
else y[TaM9<
insertSort(data, mid + 1, r - mid); FI80vV7
4KN0i
for (i = l; i <= mid; i++) { A;K{&x
temp = data; ':5U&
} tW'qO:y+
for (j = 1; j <= r - mid; j++) { IO?~b XP
temp[r - j + 1] = data[j + mid]; 9?EY.}~
} LPtx|Sx![
int a = temp[l]; +# m
int b = temp[r]; F[Qsv54
for (i = l, j = r, k = l; k <= r; k++) { C6Um6X9/i
if (a < b) { jJiCF,m
data[k] = temp[i++]; g`y/_
a = temp; b#bO=T$e-
} else { 89 _&X[X
data[k] = temp[j--]; #MmmwPB_
b = temp[j]; J$o[$G_Z
} 1',+&2)oj
} k i~Raa/e
} ":5~L9&G
VKl~oFKXJ
/** HJ2O@e
* @param data h5h-}qBA
* @param l 1"87EP
* @param i _Eet2;9
*/ C`=`Ce~|d
private void insertSort(int[] data, int start, int len) { T1Ln)CS?9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1KfJl S+
} -Hl\j(D7
} pZNlcB[Qn-
} P7M0Ce~iW
} ^v()iF !
\J#I}-a&j
堆排序： ^/4{\3
?,A8 fR
package org.rut.util.algorithm.support; n=<q3}1Jej
67EDkknt
import org.rut.util.algorithm.SortUtil; @pyA;>U
74</6T]^
/** ^;v.ytO*
* @author treeroot *GY,h$Ul
* @since 2006-2-2 y"{UNM|R
* @version 1.0 ~XN]?5GQf
*/ GcU(:V2o
public class HeapSort implements SortUtil.Sort{ zXA= se0U
[bQ8A(u
/* (non-Javadoc) k;9#4^4(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O;.d4pO(tC
*/ I+-Rs2wb
public void sort(int[] data) { IrVM|8vT3
MaxHeap h=new MaxHeap(); vwSX$OZ
h.init(data); `pn-fk
for(int i=0;i h.remove(); ixUiXP
System.arraycopy(h.queue,1,data,0,data.length); `K ~>!d_
} mAtG&my)
}1E_G
private static class MaxHeap{ ]Y/pSwnV
crF9,p
void init(int[] data){ Lt ZWs0l0
this.queue=new int[data.length+1]; 7i%P&oB
for(int i=0;i queue[++size]=data; m''iE
fixUp(size); )Q N=>J
} DXw9@b
} v:!7n
rSzXa4m(
private int size=0; c'VtRE# z~
p5D3J[?N
private int[] queue; h_}BmJh_
?7uStqa
public int get() { YV>VA<c
return queue[1]; ce-m)o/
} !3gpiQH{
|Cxip&e>
public void remove() { +=lcN~U2
SortUtil.swap(queue,1,size--); Y=#mx3.
fixDown(1); L>K39z~,
} n$Oky-P"
file://fixdown d%"@#bB
private void fixDown(int k) { {yl/T:Bh&
int j; s`7 _J9
while ((j = k << 1) <= size) { F'T= Alf
if (j < size %26amp;%26amp; queue[j] j++; A1&>L9nUx
if (queue[k]>queue[j]) file://不用交换 7Ohu$5\
break; ~`Gcq"7,!
SortUtil.swap(queue,j,k); 2+hfbFu,1
k = j; J0Rz.=Y
} ps4Wwk(
} B[k+#YYY
private void fixUp(int k) { AF{7<v>/P
while (k > 1) { /m|&nl8"qe
int j = k >> 1; [sh"?
if (queue[j]>queue[k]) I'wk/
break; d}A2I
SortUtil.swap(queue,j,k); vo^9qSX f
k = j; R2Fh^x
} clU3#8P!=
} kkuQ"^<J
r5$?4t
} /A`zy
QK/+*hr;
} #+5mpDh
)}g4Rvr
SortUtil： `cTsS
"YJ;-$rb
package org.rut.util.algorithm; Hi 0df3t
3qwYicq,
import org.rut.util.algorithm.support.BubbleSort; @R Yb-d
import org.rut.util.algorithm.support.HeapSort; q?'gwH37
import org.rut.util.algorithm.support.ImprovedMergeSort; 6 GevO3
import org.rut.util.algorithm.support.ImprovedQuickSort; s9Q)6=mE
import org.rut.util.algorithm.support.InsertSort; %BP)m(S7
import org.rut.util.algorithm.support.MergeSort; ^zs4tCW%
import org.rut.util.algorithm.support.QuickSort; e"8m+]
import org.rut.util.algorithm.support.SelectionSort; =xQfgj
import org.rut.util.algorithm.support.ShellSort; "/]tFY%Y
\(v_",
/** DWevg;_]$(
* @author treeroot Gxt<kz
* @since 2006-2-2 nfPl#]ef*
* @version 1.0 {UVm0AeUq
*/ JnKbd~
public class SortUtil { GeW$lA I
public final static int INSERT = 1; ^# g;"K0
public final static int BUBBLE = 2; z4%F2Czai&
public final static int SELECTION = 3; | 3/p8
public final static int SHELL = 4; Bv|9{:1%X}
public final static int QUICK = 5; !-}*jm p<
public final static int IMPROVED_QUICK = 6; UK9MWC5g9
public final static int MERGE = 7; o[+|n[aT)3
public final static int IMPROVED_MERGE = 8; V5^b6$R@
public final static int HEAP = 9; OU964vv
R;m0eG`
public static void sort(int[] data) { .Yv.-A=ZIg
sort(data, IMPROVED_QUICK); {~{s=c0
} f0'Wq^^
private static String[] name={ /xbF1@XtL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sYW)h$p;D
}; 4Xho0lO&
wjGjVTtHs
private static Sort[] impl=new Sort[]{ HC`3AQ12!&
new InsertSort(), ,(Hmk(,
new BubbleSort(), !`Yi{}1_
new SelectionSort(), <("w'd}
new ShellSort(), s7cyo ]
new QuickSort(), K@u."eaD
new ImprovedQuickSort(), wk7_(gT`0
new MergeSort(), h+d;`7Z>
new ImprovedMergeSort(), g.sV$.T2K
new HeapSort() ^XB8A=xi
}; Zkep7L
:[rKSA]@
public static String toString(int algorithm){ #$^i x
return name[algorithm-1]; V# %spW
} 6G})h!
x;]{ 8#-z
public static void sort(int[] data, int algorithm) { .7^-*HT}
impl[algorithm-1].sort(data); 1X}Tp\e
} a9_KQ=&CI
JBJ7k19;
public static interface Sort { ]O ` [v
public void sort(int[] data); g#2X'%&+
} 3jVm[c5%]
)'CEWc%
public static void swap(int[] data, int i, int j) { "$V2$
int temp = data; -ZON']|<}k
data = data[j]; a~TZ9yg+HL
data[j] = temp; DyTk<L
} ZvKMRW
} /'_ RI