[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; Avlz=k1*
} jJZgK$5+
int i1=l; C'A]i5
int i2=mid+1; 1"#*)MF
for(int cur=l;cur<=r;cur++){ *e#<n_%R
if(i1==mid+1) 1w(JEqY3h:
data[cur]=temp[i2++]; xI*#(!x"G
else if(i2>r) DI|:p!Nx
data[cur]=temp[i1++]; L,,*gK
else if(temp[i1] data[cur]=temp[i1++]; ]aryV?!6
else JUAS$Y
data[cur]=temp[i2++]; ~z5R{;Nbz|
} =*vMA#e
} V DS23Bo
)yK[Zb[
} HO)/dZNU
p&-'|'![l
改进后的归并排序: 'R<&d}@P*#
9@ 16w
package org.rut.util.algorithm.support; 9Z5D\yv?H
3q:n'PC)C
import org.rut.util.algorithm.SortUtil; 3]&o*Ib1`_
evA/+F,&
/** qFQ8
* @author treeroot NS)}6OI3~"
* @since 2006-2-2 6$fYt&1
* @version 1.0 &k7;DO
*/ 4)>FS'=
public class ImprovedMergeSort implements SortUtil.Sort { KInk^`C/H
y! .J
private static final int THRESHOLD = 10; Zk8|K'oHx
6]zd.W
/* ig LMv+{
* (non-Javadoc) }N0Qm[R
* r|e-<t4.9L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D]a<4a18
*/ !\8 ;d8
public void sort(int[] data) { VQ5nq'{v
int[] temp=new int[data.length]; D?yG+%&9
mergeSort(data,temp,0,data.length-1); |t iUej
} &N~ZI*^
bwM@/g%DL
private void mergeSort(int[] data, int[] temp, int l, int r) { &!aAO(g
int i, j, k; }]n$ %g(
int mid = (l + r) / 2; +Q=1AXe
if (l == r) `LAR@a5i
return; l {jmlT
if ((mid - l) >= THRESHOLD) ?{w3|Ef&
mergeSort(data, temp, l, mid); -Y Bd, k3
else uXDq~`S
insertSort(data, l, mid - l + 1); CC\*?BKj"
if ((r - mid) > THRESHOLD) 3p2P= T
mergeSort(data, temp, mid + 1, r); ;$Y4xM`=m
else ")O`mXg-
insertSort(data, mid + 1, r - mid); VhjM>(
;,i]w"*
for (i = l; i <= mid; i++) { i wxVl)QL
temp = data; )[mwP.T=
} 5zFR7/p{
for (j = 1; j <= r - mid; j++) { P`s
temp[r - j + 1] = data[j + mid]; -/{4Jf Wf
} x3qW0K8
int a = temp[l]; pj4!:{.;
int b = temp[r]; >9RD_QG7
for (i = l, j = r, k = l; k <= r; k++) { {u1V|q
if (a < b) { aLJ(?8M@
data[k] = temp[i++]; )o-Q!<*1
a = temp; t#%R q
} else { '>$]{vQ3
data[k] = temp[j--]; E0%~!b
b = temp[j]; s&\I=J.
} B+^(ktZp@
} \AL f$88>@
} !RyO\>:q
\#o2\!@`
/** /%_OW@ ?
* @param data '13ZX:
* @param l ) ri}nL.
* @param i p.+ho~sC,.
*/ |#6QThK
private void insertSort(int[] data, int start, int len) { 3^s/bm$g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bs?7:kN(
} 1]orUF&_
} 54 >-
} 7jnIv];i
} moP,B~
pv^O"Bs
堆排序： /Uo y/}!
=K{\p`?
package org.rut.util.algorithm.support; cUTE$/#s
%QKZT=}
import org.rut.util.algorithm.SortUtil; #2r}?hP/m
/'31w9
/** +w=AJdc
* @author treeroot o9cM{ya/>
* @since 2006-2-2 5M9 I,
* @version 1.0 oB74y
*/ JaB<EL-9r2
public class HeapSort implements SortUtil.Sort{ Gmf B
[<'-yQ{l\
/* (non-Javadoc) Us+pc^A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J'N!Omz
*/ sdQkT#%y
public void sort(int[] data) { rvr-XGK36\
MaxHeap h=new MaxHeap(); vN3Zr34
h.init(data); BD`2l!d
for(int i=0;i h.remove(); WVY\&|)$
System.arraycopy(h.queue,1,data,0,data.length); ]E]2o
} 1"pw
Sm~l:v0%
private static class MaxHeap{ o.q/O)'V u
#v<QbA
void init(int[] data){ MwmUgN"g
this.queue=new int[data.length+1]; &QhX1dT+
for(int i=0;i queue[++size]=data; UQB"v3Z
fixUp(size); F<!)4>2@
} fu90]upz~
} ^h{)Gf,+\
q$aaA`E%
private int size=0; 4wrk2x[
|j 6OM{@
private int[] queue; B" 3dQwQ
Qx[t/~
public int get() { qIld;v8w"g
return queue[1]; -WYAN:s
} P;k0W>~k
z)HD`Ho
public void remove() { _x!7}O#k
SortUtil.swap(queue,1,size--); A^p[52`
fixDown(1); xhRngHU\z<
} To?W?s
file://fixdown bT&: fHc
private void fixDown(int k) { W3iZ|[E;
int j; _6wFba@>/n
while ((j = k << 1) <= size) { }N*_KzPIa
if (j < size %26amp;%26amp; queue[j] j++; }<dRj
if (queue[k]>queue[j]) file://不用交换 ~i`>adJ:
break; yz0zFfiX
SortUtil.swap(queue,j,k); A<W6=5h
k = j; ?2>FdtH
} nxr!`^Mne
} ATR!7i\|
private void fixUp(int k) { +wkjS r`e
while (k > 1) { /{|fyKo\?
int j = k >> 1; F$[ U|%*
if (queue[j]>queue[k]) o`Ta("9^
break; rD*sl}
SortUtil.swap(queue,j,k); y K"kEA[;
k = j; %Qj;,#z
} %Q.&ZhB
} ZcaX'5}!S
F+@5C:<?
} t*?0D\b 2
KCWc`Oz
} 1bH;!J
D:Zy
SortUtil： vBog0KD);s
s M+WkN}{
package org.rut.util.algorithm; |m2X+s9
DG?"5:Zd
import org.rut.util.algorithm.support.BubbleSort; Ps 8%J;
import org.rut.util.algorithm.support.HeapSort; CP6LHkM9
import org.rut.util.algorithm.support.ImprovedMergeSort; Qci4J
import org.rut.util.algorithm.support.ImprovedQuickSort; kcQ'$<Mz<
import org.rut.util.algorithm.support.InsertSort; FXs*vg`
import org.rut.util.algorithm.support.MergeSort; 4n4?4BEn
import org.rut.util.algorithm.support.QuickSort; hiUD]5Kp
import org.rut.util.algorithm.support.SelectionSort; 1|ra&(=)
import org.rut.util.algorithm.support.ShellSort; mdw7}%5V
z(H^..<!5
/** _%GGl$kH
* @author treeroot ^.>jGI%rB
* @since 2006-2-2 (7r<''
* @version 1.0 &-mX ,
*/ IV)<5'v
public class SortUtil { Pcw6!xH
public final static int INSERT = 1; LGl2$#x
public final static int BUBBLE = 2; (<)]sp2
public final static int SELECTION = 3; AhNq/?Q Q~
public final static int SHELL = 4; xe*aC
public final static int QUICK = 5; AW,53\ 0
public final static int IMPROVED_QUICK = 6; 5:kH;/U
public final static int MERGE = 7; RoyPrO [3
public final static int IMPROVED_MERGE = 8; &SrO)
public final static int HEAP = 9; CjiVnWSz<
d$ ^ ,bL2p
public static void sort(int[] data) { =dFv/F/RW
sort(data, IMPROVED_QUICK); W]nSR RWco
} |<GDUwC_;
private static String[] name={ _N@ro
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2"B_At
}; OD5m9XS
DS'n
private static Sort[] impl=new Sort[]{ APO>y
new InsertSort(), &0`) Q
new BubbleSort(), {>F7CT'G6
new SelectionSort(), ^g`&7tX
new ShellSort(), d`F&aC
new QuickSort(), 4!LCR}K
new ImprovedQuickSort(), 7R\oj8[
new MergeSort(), qcN'e.A
new ImprovedMergeSort(), IEzaK
new HeapSort() AU$Uxwz4
}; FD8N"p
|Z*J/v'@p
public static String toString(int algorithm){ }5(Ho$S(
return name[algorithm-1]; HTyLJe
} +9")KQT
>2Kh0rIH
public static void sort(int[] data, int algorithm) { VL*ovD%-
impl[algorithm-1].sort(data); z5r$M
} Ck!VV2U#
+*hm-lv?
public static interface Sort { 1Y]TA3:
public void sort(int[] data); J52 o g4l
} 0gfA#|'
7=DjI ~
public static void swap(int[] data, int i, int j) { Yk5}`d!:
int temp = data; GPGm]Gt
data = data[j]; 4A2?Uhpy
data[j] = temp; YE9,KVV;$n
} dtcIC0:[
} <0PT"ij