[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; ma)Y@Uw M
} Q|q.~x<RQ
int i1=l; 9^h0D}#@
int i2=mid+1; ZW{pO:-
for(int cur=l;cur<=r;cur++){ &x =}m
if(i1==mid+1) _5 Zhv-7
data[cur]=temp[i2++]; p}$VBl$'
else if(i2>r) BUqe~E|I
data[cur]=temp[i1++]; ~mP#V
else if(temp[i1] data[cur]=temp[i1++]; \R#]}g0!
else bnt>j0E
data[cur]=temp[i2++]; y=_8ae}aD~
} 'te4mY}
} AP&mr1_
'gHa3:US
} I&^B?"Y
uO8z.
改进后的归并排序: DUUQz:?{J
_]E H~;
package org.rut.util.algorithm.support; pJ!:mt
d%FD=wm
import org.rut.util.algorithm.SortUtil; Pb4%"9`
&sleV5V
/** ,_?P[~1
* @author treeroot {gT2G*Ed^Z
* @since 2006-2-2 ^iAOz-H
* @version 1.0 pT\>kqmj
*/ \yP\@cpY{
public class ImprovedMergeSort implements SortUtil.Sort { ,)^4H>~V
OBp<A+a
private static final int THRESHOLD = 10; BO)K=gl;8
:Lu=t3#
/* 2x%Xx3!
* (non-Javadoc) b2]1Dfw
* g/e\EkT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^EY^.?Mg
*/ p2s*'dab7
public void sort(int[] data) { SC/|o
int[] temp=new int[data.length]; I/:M~ b
mergeSort(data,temp,0,data.length-1); h8OmO5/H
} w9h`8pt
?hu}wl)
private void mergeSort(int[] data, int[] temp, int l, int r) { I*8i=O@0T
int i, j, k; 3~v'Ev
int mid = (l + r) / 2; Sxo9y0K8-
if (l == r) oRmz'F
return; =g)|g+[H
if ((mid - l) >= THRESHOLD) qk!")t
mergeSort(data, temp, l, mid); d(!W
else 1 XsB
insertSort(data, l, mid - l + 1); d/oxRzk'L
if ((r - mid) > THRESHOLD) ,ND}T#yTR
mergeSort(data, temp, mid + 1, r); +72[*_ <
else ], Xva`"
insertSort(data, mid + 1, r - mid); 7J?`gl&C
$KDH"J
for (i = l; i <= mid; i++) { e lj]e
temp = data; M{\W$xPL)
} #'s}=i}y"C
for (j = 1; j <= r - mid; j++) { `j+[JMr
temp[r - j + 1] = data[j + mid]; =To}yJ#
} 0G@sj7)]
int a = temp[l]; h2M>4c
int b = temp[r]; ?VVtEmIN
for (i = l, j = r, k = l; k <= r; k++) { "\0&1C(G
if (a < b) { ;.*n77Y
data[k] = temp[i++]; o ;nw;]oR
a = temp; mhTi{t_fHM
} else { .[YM0dt
data[k] = temp[j--]; .KH3.v/c|
b = temp[j]; P")duv
} %^1@c f?.
} (<y~]igy
} n *Y+y
, H$1iJ?
/** *htv:Sr
* @param data ,|RS]I>X
* @param l )y8 u+5^
* @param i 3@xn<eu
*/ [wKnJu
private void insertSort(int[] data, int start, int len) { kC~\D?8E=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zl~`>
} 6R_G{AWLL
} dk}T&qZ~p
} 7Uy49cs,
} gr]:u4}
HHd;<%q
堆排序： !I3_KuJ5
@nIoYT='
package org.rut.util.algorithm.support; }\+7*|
q0* e1QL
import org.rut.util.algorithm.SortUtil; eAvOT$
ey4RKk,
/** %p?+r
* @author treeroot xz9xt
* @since 2006-2-2 yMz%s=rh
* @version 1.0 ! n@*6
*/ 0|mF /
public class HeapSort implements SortUtil.Sort{ osB8 '\GR
ZV:cgv
/* (non-Javadoc) f]N.$,:$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T_T@0`7
*/ !{hC99q6
public void sort(int[] data) { PDwi])6mf
MaxHeap h=new MaxHeap(); kY e3A&J
h.init(data); (- ]A1WQ?
for(int i=0;i h.remove(); iIZDtZFF
System.arraycopy(h.queue,1,data,0,data.length); bo>4:i
} WKjE^u
d5aG6/
private static class MaxHeap{ ){'Ef_/R
@D:$~4ks
void init(int[] data){ <K6:"
this.queue=new int[data.length+1]; S(bYN[U
for(int i=0;i queue[++size]=data; RZKdh}B?\
fixUp(size); 2h Wtpus
} h?cf)L
} LI`L!6^l
x}acxu 2H7
private int size=0; }ZPO^4H;-
HfQZRDH
private int[] queue; /HlLfW
&356
public int get() { SEf:u
return queue[1]; q#}#A@Rg
} heLWVI[so
bLSZZfq
public void remove() { w4 R!aWLd
SortUtil.swap(queue,1,size--); dS+/G9X^
fixDown(1); =1/d>kke
} vUlGE
file://fixdown PAYbsn
private void fixDown(int k) { D/& 8[Z/Cn
int j; iR_j h=2{
while ((j = k << 1) <= size) { HLD8W8
if (j < size %26amp;%26amp; queue[j] j++; 6R.%I{x'
if (queue[k]>queue[j]) file://不用交换 l+%2kR
break; :[hZn/
SortUtil.swap(queue,j,k); e7T}*Up
k = j; C2$_Ad=s
} y,D@[*~Xb
} +0{$J\s
private void fixUp(int k) { Rv-`6eyAA
while (k > 1) { %Y0,ww2
int j = k >> 1; HNFG:t9
if (queue[j]>queue[k]) m{dXN=
break; 6a_MA*XK
SortUtil.swap(queue,j,k); UaW,#P
k = j; @/(\YzQvp]
} ?p&CR[
} ]j=Eof%Rc
+JDQ`Qk
} Jf#Ika&px
*y6zwe !M
} S-^:p5{r
Bf)}g4nYn
SortUtil： :TPT]q d@
j@7%%
package org.rut.util.algorithm; FR bmeq3c
pJnT \~o
import org.rut.util.algorithm.support.BubbleSort; RB,`I#z1f
import org.rut.util.algorithm.support.HeapSort; @ PboT1
import org.rut.util.algorithm.support.ImprovedMergeSort; /Qa'\X,f3
import org.rut.util.algorithm.support.ImprovedQuickSort; yniXb2iM
import org.rut.util.algorithm.support.InsertSort; lKtA.{(
import org.rut.util.algorithm.support.MergeSort; 1KHFzx,
import org.rut.util.algorithm.support.QuickSort; \3WF-!xe
import org.rut.util.algorithm.support.SelectionSort; .el&\Jt
import org.rut.util.algorithm.support.ShellSort; ()Tl\
pm)kocG
/** Wqy\yS [
* @author treeroot =sp5.-r
* @since 2006-2-2 =hw&2c
* @version 1.0 #![9QUvcf
*/ eNQQ`ll@m
public class SortUtil { j=q*b Qr
public final static int INSERT = 1; t\GoUeH]
public final static int BUBBLE = 2; [WfigqY`b*
public final static int SELECTION = 3; H}ie D"T_
public final static int SHELL = 4; x/<eY<Vgm?
public final static int QUICK = 5; %>)HAx `
public final static int IMPROVED_QUICK = 6; CXAW>VdK_
public final static int MERGE = 7; uPbGQ:%}
public final static int IMPROVED_MERGE = 8; t9QnEP'
public final static int HEAP = 9; fV "gL(7
yA+NRWWj
public static void sort(int[] data) { 88]4GVi
sort(data, IMPROVED_QUICK); NZ|(#` X
} bXiOf#:''
private static String[] name={ k}0Y&cT!rU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3QD+&9{D
}; XCN^>ToD
SV?^i`
private static Sort[] impl=new Sort[]{ Y&![2o.Q
new InsertSort(), spX*e1
new BubbleSort(), .kl.awT
new SelectionSort(), e>6NO
new ShellSort(), uV|%idC
new QuickSort(), /QgU!:e
new ImprovedQuickSort(), 1M={8}3
new MergeSort(), qV7F=1k]
new ImprovedMergeSort(), VfV|fuW
new HeapSort() B$\,l.hE
}; 6r]l8*34;
o/J2BZ<_<
public static String toString(int algorithm){ K6z)&<
return name[algorithm-1]; h1_9Xp~N
} :`Z'vRj
m9Pzy^g1
public static void sort(int[] data, int algorithm) { ,f[`C-\Q%
impl[algorithm-1].sort(data); 3*v&6/K
} +";<Kd-
J#/L}h;qH
public static interface Sort { ,UveH` n-
public void sort(int[] data); aAi"
} U+4W9zhwo
cns~)j~
public static void swap(int[] data, int i, int j) { +YX*.dW
int temp = data; ;_nV*G.y#^
data = data[j]; -W\1n#J
data[j] = temp; &{R]v/{p]
} SK]"JSY`
} f|r+qe