[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; R){O]<+
} 8>6<GdGL<n
int i1=l; "kBVHy
int i2=mid+1; ID!S}D
for(int cur=l;cur<=r;cur++){ Zf<T`'_d
if(i1==mid+1) =>tkc/aa
data[cur]=temp[i2++]; b7I0R;Zj
else if(i2>r) J5HK1
data[cur]=temp[i1++]; !6RDq`
else if(temp[i1] data[cur]=temp[i1++]; 3&AJN#c
else Ba|}$jo
data[cur]=temp[i2++]; `BG>%#
} %O"Whe
} ,+6u6
ruB D ^-
} ]&q<O0^'
\4G9YK-N>
改进后的归并排序: (l-=/6-
Zl3e=sg=
package org.rut.util.algorithm.support; |3!)
ha=2isq
import org.rut.util.algorithm.SortUtil; 2ww H3}
ryh"/lu[B
/** oVn&L*H
* @author treeroot Wkjp:`(-$r
* @since 2006-2-2 .Wy'
* @version 1.0 C~@m6K
*/ &Mudu/KTr
public class ImprovedMergeSort implements SortUtil.Sort { H)gc"aRe;Y
E?P>s T3B
private static final int THRESHOLD = 10; 5V =mj+X?
r~f;g9I
/* su1fsoL0
* (non-Javadoc) ,(K-;Id4
* S2*sh2-&6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y2s(]#8
*/ B>!mD{N
public void sort(int[] data) { JW^ ${4
int[] temp=new int[data.length]; c!7WRHJE_a
mergeSort(data,temp,0,data.length-1); oe 6-F)+
} ZCc23UwI
E&y)`>Nq{
private void mergeSort(int[] data, int[] temp, int l, int r) { Xy=ETV%
int i, j, k; 3x+=7Mg9
int mid = (l + r) / 2; J9*;Bqzim
if (l == r) 7_l Wr
return; )lS04|s
if ((mid - l) >= THRESHOLD) `NgQ>KV!
mergeSort(data, temp, l, mid); ?#(LH\$l_
else ]k7%p>c=B
insertSort(data, l, mid - l + 1); 37a1O>A
if ((r - mid) > THRESHOLD) z+6PVQ
mergeSort(data, temp, mid + 1, r); IjRUr\l
else WH1" HO
insertSort(data, mid + 1, r - mid); C5I7\9F)
iO?^y(phC
for (i = l; i <= mid; i++) { 'F.P93
temp = data; W4d32+V
} Ti_G
for (j = 1; j <= r - mid; j++) { \X%FM"r
temp[r - j + 1] = data[j + mid]; ``VE<:2+
} ZSe30Rl\
int a = temp[l]; X5 or5v
int b = temp[r]; ~i?A!
for (i = l, j = r, k = l; k <= r; k++) { rnhLv$
if (a < b) { 0LL0\ly]
data[k] = temp[i++]; dEKu5GI
a = temp; ?yq=c
} else { Um4zI>
data[k] = temp[j--]; uZrp ^
b = temp[j]; .qZz'Eq[
} g1[BrT,
} ^`";GnH0
} FVrB#Hw~
nf"#F@dk
/** 'hBnV xd&
* @param data $Uy+]9
* @param l ^?""'1iuQx
* @param i U{oM*[
*/ X5J)1rL
private void insertSort(int[] data, int start, int len) { Tf]ou5|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a7ZufB/
} sZ&|omN
} S8/~'<out
} JP6 Noia
} A~a 3bCX+"
mKO~`Wq%@
堆排序： {zm8`
A"b31*_
package org.rut.util.algorithm.support; qQ3Q4R\
q/I( e
import org.rut.util.algorithm.SortUtil; ;2`6eyr
H<i!C|AF
/** E:**gvfq
* @author treeroot 8o%Vn'^t
* @since 2006-2-2 {X(nn.GpC
* @version 1.0 v8yCf7+"
*/ {*GBUv5
public class HeapSort implements SortUtil.Sort{ _h}(jEd!
Bi.,@7|>
/* (non-Javadoc) ty"|yA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S/itK3
*/ - w{`/
public void sort(int[] data) { y*G3dWb
MaxHeap h=new MaxHeap(); wtl3Ex,DO
h.init(data); =JkPE2mU
for(int i=0;i h.remove(); diz=|g=w
System.arraycopy(h.queue,1,data,0,data.length); Wbq0K6X
} ~'9\y"N1
uc<JF=
private static class MaxHeap{ w4nU86oZYl
w)rd--9f
void init(int[] data){ %,1xOl4l
this.queue=new int[data.length+1]; "t.Jv%0=
for(int i=0;i queue[++size]=data; !K8Kw W|X
fixUp(size); 2;wpD2
} >1}@Q(n/}{
} o2 ;
C`@gsF"<7
private int size=0; 9\zasa
&E]<dmR
private int[] queue; O"M2*qiH
>\7Mf@c
public int get() { V&h{a8xa$
return queue[1]; E/3i_R
} 6~!QibA|P
b8 ^O"oDrp
public void remove() { }@y(-7t
SortUtil.swap(queue,1,size--); oH,{'S@q
fixDown(1); gTS}'w{
} nO+-o;DbC
file://fixdown |AQU\BUj
private void fixDown(int k) { `pYyr/
int j; ?u?Nhf %b
while ((j = k << 1) <= size) { 3'7]jj
if (j < size %26amp;%26amp; queue[j] j++; 03/mB2|TF(
if (queue[k]>queue[j]) file://不用交换 DFXHD,o
break; ELN1F0TneH
SortUtil.swap(queue,j,k); )n&6= Li
k = j; M!/!*,~
} &RHZ7T
} '8yCwk
private void fixUp(int k) { _UA|0a!-
while (k > 1) { 4 Aj<k
int j = k >> 1; ]#\De73K
if (queue[j]>queue[k]) ri`;
break; E!9(6G4
SortUtil.swap(queue,j,k); r j.X"
k = j; YNB7`:
} j"s7P%
} S\SYFXUl
F%:74.]Y
} l*$~Y0
.(&w/jR
} FVxORQI
i5,yrPF
SortUtil： HU/2P`DGP
'~9w<dSB!r
package org.rut.util.algorithm; SajG67
L)n_ Q
import org.rut.util.algorithm.support.BubbleSort; | .gE9'"bv
import org.rut.util.algorithm.support.HeapSort; Y?qUO2
import org.rut.util.algorithm.support.ImprovedMergeSort; @#p6C
import org.rut.util.algorithm.support.ImprovedQuickSort; #tIeI6Qw
import org.rut.util.algorithm.support.InsertSort; sVpET
import org.rut.util.algorithm.support.MergeSort; OQIr"
import org.rut.util.algorithm.support.QuickSort; Zq~Rkx
import org.rut.util.algorithm.support.SelectionSort; ;Nw)zS
import org.rut.util.algorithm.support.ShellSort; p'0X>>$
iR!]&Oh
/** c{IL"B6>
* @author treeroot zm{`+boH<
* @since 2006-2-2 =axuLP))
* @version 1.0 t#VX#dJ
*/ f5Hv![x
public class SortUtil { >"+ho
public final static int INSERT = 1; Q;s{M{u
public final static int BUBBLE = 2; ]8htL#C
public final static int SELECTION = 3; kTcW=AXu
public final static int SHELL = 4; |[0Ijm2
public final static int QUICK = 5; [1Aoj|
public final static int IMPROVED_QUICK = 6; 73_=CP"t
public final static int MERGE = 7; .EReYZO
public final static int IMPROVED_MERGE = 8; GkIhPn(d
public final static int HEAP = 9; cMrO@=b;
{r~=mQ
public static void sort(int[] data) { ?t<g|H/|6
sort(data, IMPROVED_QUICK); Na4O( d`
} }H<Z`3_U%
private static String[] name={ %^d<go^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =CW> ;h]
}; MGf*+!y,
+w7U7" xQ
private static Sort[] impl=new Sort[]{ *8_Dn}u?Jx
new InsertSort(), 2+/r~LwbK
new BubbleSort(), dW22v!
new SelectionSort(), >& 4):
new ShellSort(), Eyz.^)r
new QuickSort(), )4h|7^6ji
new ImprovedQuickSort(), A.mFa1lH
new MergeSort(), @u`W(Ow
new ImprovedMergeSort(), OFBEJacy
new HeapSort() }.pqV X{d
}; PhPe7^
cs7^#/3<
public static String toString(int algorithm){ 2$MoKOx8$
return name[algorithm-1]; &Z3%UOY
} 8f1M6GK?
Bd 0oA )i
public static void sort(int[] data, int algorithm) { kBLFK3i
impl[algorithm-1].sort(data); V7}'g6X
} T`MM<+^G
*p=enflU
public static interface Sort { M7T*J>i
public void sort(int[] data); }]#z0'Aqsu
} en/h`h]h
g\?v 5
public static void swap(int[] data, int i, int j) { Lyf5Yf([-
int temp = data; op/_:#&'
data = data[j]; ^eyVEN
data[j] = temp; OSfT\8YA
} ,(-V<>/*.|
} ~1E!Co