[JAVA]用Java实现的各种排序

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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; tYC`?HT
} - (VV
int i1=l; `Yn^ -W
int i2=mid+1; vHZw{'5y
for(int cur=l;cur<=r;cur++){ K8$Hg:Ky-/
if(i1==mid+1) @sO*O4os>
data[cur]=temp[i2++]; \5BI!<
else if(i2>r) U{q6_z|c
data[cur]=temp[i1++]; :CV!:sUm
else if(temp[i1] data[cur]=temp[i1++]; T?I&n[Y|
else 36s[hg
data[cur]=temp[i2++]; pv~XZ(J.1
} U SXz
} hY7Q$B<
LS{g=3P0
} zU:zzT}|TZ
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改进后的归并排序: yb2*K+Kv
9t(B{S
package org.rut.util.algorithm.support; ]F r+cP
1M7=*w,
import org.rut.util.algorithm.SortUtil; %np b.C|+
y@ J\h8_
/** 4xuL{z;\
* @author treeroot !bFa\6]q
* @since 2006-2-2 h6}oRz9=g
* @version 1.0 B!K{y>|.
*/ c=<d99Cu!
public class ImprovedMergeSort implements SortUtil.Sort { )#l &F$
R|% 3JE0
private static final int THRESHOLD = 10; B08q/qi
f&bY=$iff
/* [Qa0uM#SU
* (non-Javadoc) Jvw~b\
* %L+/GtxK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S3PW[R@=
*/ !s/ij'T
public void sort(int[] data) { ^2[0cne
int[] temp=new int[data.length]; W78Z<Vm
mergeSort(data,temp,0,data.length-1); u|<Z};a
} Ih!UL:Ckh
0|9(oP/:
private void mergeSort(int[] data, int[] temp, int l, int r) { ELeR5xT
int i, j, k; M.1R]x(|
int mid = (l + r) / 2; -N(y+~wN
if (l == r) u`$,S&Er
return; %4Ylq|d
if ((mid - l) >= THRESHOLD) 2/RK pl &
mergeSort(data, temp, l, mid); e<dFvMO
else dt{|bQLu3
insertSort(data, l, mid - l + 1); <~!7?ak
if ((r - mid) > THRESHOLD) Pk T&zSQA
mergeSort(data, temp, mid + 1, r); W%hdS<b
else i)Vqvb0Q
insertSort(data, mid + 1, r - mid); b{)9?%_
Hq8<g$
for (i = l; i <= mid; i++) { J\b,rOIf
temp = data; \/$T 3f`x
} P.$U6cq
for (j = 1; j <= r - mid; j++) { #!u P>/
temp[r - j + 1] = data[j + mid]; G5egyP;
} 3Zs|arde2
int a = temp[l]; zL5r8mD3
int b = temp[r]; TD].*9
for (i = l, j = r, k = l; k <= r; k++) { 6*cm
if (a < b) { /xJ,nwp7
data[k] = temp[i++]; d*khda;Vj
a = temp; 2x{@19w)C
} else { 17tph;
data[k] = temp[j--]; z11;r]VI
b = temp[j]; S,fMGKcq
} 2/sD#vC
} w&f8AY)#]4
} m=Y9sB
c!T^JZBb
/** h`Vb#5ik
* @param data 73P=<3
* @param l IhwJYPLF
* @param i 9~I\WjB "
*/ cEnkt=
private void insertSort(int[] data, int start, int len) { P5*:r3>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZZA!Y9ia2
} I7r{&X) D
} YR'?fr
} E0$UoP
} 9*GwW&M%1_
B]ul~FX
堆排序： 5Qd |R
5)' _3r
package org.rut.util.algorithm.support; x=Qy{eIe
f)H6 nl7r
import org.rut.util.algorithm.SortUtil; ~mOGNf?f
ji?0;2Y
/** -Cd4yWkO
* @author treeroot 8[Cp
* @since 2006-2-2 25BW/23}e
* @version 1.0 ^_9 ^iL
*/ B)O=wx
public class HeapSort implements SortUtil.Sort{ NoO>CjeFb
l " pCxA
/* (non-Javadoc) iC?s`c0B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P0~3<h?U8
*/ <Q/^[
public void sort(int[] data) { 7s;<5xc
MaxHeap h=new MaxHeap(); D$q"k"
h.init(data); |Yh-`~~A"
for(int i=0;i h.remove(); #QXv[%k
System.arraycopy(h.queue,1,data,0,data.length); Wg[?i C*~
} g9}u6q
OOQfa#~k
private static class MaxHeap{ au9r)]p-
O_K@\<;~
void init(int[] data){ {R `IA|T#k
this.queue=new int[data.length+1]; /_@S*=T5
for(int i=0;i queue[++size]=data; 4A^hP![c#]
fixUp(size); 7{RI`Er`
} E:V&:9aQ@
} !H{)L@f
Iwi>yx8
private int size=0; <*0MD6$5
;_amgRP7$
private int[] queue; N#@xo)-H
8A"[n>931
public int get() { -b~MQ/,2
return queue[1]; ih.UzPg
} </t_<I0{
B}X C
public void remove() { x5v^@_: jr
SortUtil.swap(queue,1,size--); WGN[`D"
fixDown(1); pu=T pSZ
} %56pP"w
file://fixdown 1,`-n5@J%n
private void fixDown(int k) { rtvuAFiH
int j; ->n<9
while ((j = k << 1) <= size) { {.bLh0
if (j < size %26amp;%26amp; queue[j] j++; 5 usfyY]z
if (queue[k]>queue[j]) file://不用交换 daaUC
break; r=n|MT^O
SortUtil.swap(queue,j,k); ?)<zrE5p
k = j; aw/Y#
} VxjEKc
} 1@yXVD/
private void fixUp(int k) { '&Q_5\Tn
while (k > 1) { g,Kb9['
int j = k >> 1; _Jk-nZgn
if (queue[j]>queue[k]) SOb17:o3|
break; vF;6Y(h>
SortUtil.swap(queue,j,k); tirw{[X0n
k = j; 75K~ebRr
} Vm'ReH
} /4#.qq0\{c
F){f{-@)
} j:"+/5rV8
}!0,(<EsV
} nf,>l0,,'
}zRYT_:
SortUtil： [A|W0
*0i
package org.rut.util.algorithm; *u>2"!+Ob
eG|e1tK+
import org.rut.util.algorithm.support.BubbleSort; _8\Uukm
import org.rut.util.algorithm.support.HeapSort; cmt3ceCb
import org.rut.util.algorithm.support.ImprovedMergeSort; .Y_RI&B!L
import org.rut.util.algorithm.support.ImprovedQuickSort; tH5f;mY,
import org.rut.util.algorithm.support.InsertSort; ijr*_=
import org.rut.util.algorithm.support.MergeSort; [4kx59J3b
import org.rut.util.algorithm.support.QuickSort; :|<D(YA
import org.rut.util.algorithm.support.SelectionSort; |?s%8c'w=
import org.rut.util.algorithm.support.ShellSort; *{Wh-bc
Mb\~WUWI
/** &w2.b:HF
* @author treeroot $MKx\qx}
* @since 2006-2-2 1(w0*`
* @version 1.0 V?Lf&X?
*/ o80pmy7@
public class SortUtil { ~Az20RrK)
public final static int INSERT = 1; ETH`.~%
public final static int BUBBLE = 2; j!mI9*hP
public final static int SELECTION = 3; 1)#<nk)I
public final static int SHELL = 4; ~IE:i-Kz
public final static int QUICK = 5; H b]
public final static int IMPROVED_QUICK = 6; o4Fh`?d}
public final static int MERGE = 7; mb0${n~fz
public final static int IMPROVED_MERGE = 8; <$UMMA
public final static int HEAP = 9; b$PNZC8f
Y4@~NCU/
public static void sort(int[] data) { ?-#w [J'6
sort(data, IMPROVED_QUICK); ~W5fJd0
} IAnY+=^
private static String[] name={ ,U>g LTS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #$jAGt3^BT
}; [+{ ot
/Ia=/Jj7N
private static Sort[] impl=new Sort[]{ ~lCG37
new InsertSort(), BRoi`.b:
new BubbleSort(), z9h`sY~
new SelectionSort(), 'QeqWn
new ShellSort(), 5y=X?hF~)
new QuickSort(), iA^w2K
new ImprovedQuickSort(), A6lf-8ncx
new MergeSort(), feNr!/
new ImprovedMergeSort(), 6 Y&OG>_\
new HeapSort() 'AeU
}; n9bX[+#d
ji A$6dZU
public static String toString(int algorithm){ 3WPMS/
return name[algorithm-1]; VxjHB?)
} b ";#qVv C
8C,?Ai<ro
public static void sort(int[] data, int algorithm) { "kP.Kx!
impl[algorithm-1].sort(data); L2{tof
} GgA =EdJn
Ma-^o<{
public static interface Sort { e{=7,DRH<
public void sort(int[] data); J'@I!Jc
} 0R_ZP12
5 Nl>4d`
public static void swap(int[] data, int i, int j) { K/MIDH
int temp = data; r2""p
data = data[j]; _<t3~{qUT
data[j] = temp; M/UJb1<
} v{JCEb&wN
} .]r[0U