[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; R5 47
} eO;i1>
int i1=l; 6~zR(HzV{
int i2=mid+1; 0fA42*s;
for(int cur=l;cur<=r;cur++){ ;'l Hw]}O*
if(i1==mid+1) v{`Z
data[cur]=temp[i2++]; B+S &vV
else if(i2>r) -q' np0H
data[cur]=temp[i1++]; uMa: GDh7
else if(temp[i1] data[cur]=temp[i1++]; 9\i;zpN\
else tk"L2t
data[cur]=temp[i2++]; *6 -;iT8
} [:sPZ{
} pq_DYG]
W7.O(s,32
} l=D E|:
+#8?y 5~q
改进后的归并排序: k1Zu&4C\
=<fH RX`
package org.rut.util.algorithm.support; &&$/>[0=.
^@l_K +T
import org.rut.util.algorithm.SortUtil; S!.aBAW
u^a\02aV[
/** 3U<\y6/
* @author treeroot & tQHxiDX
* @since 2006-2-2 S+>&O3m
* @version 1.0 .O @bX)
*/ 4 q}1
public class ImprovedMergeSort implements SortUtil.Sort { |57KTiiNLI
f^](D'L?D
private static final int THRESHOLD = 10; g0I<Fan
8yz A W&q
/* 2n+j.
* (non-Javadoc) zYpIG8"o5
* heoOOP(#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }hyK/QUCoN
*/ N%;Q[*d@/
public void sort(int[] data) { y2>v'%]2
int[] temp=new int[data.length]; Z)'jn8?P
mergeSort(data,temp,0,data.length-1); 8OH<ppi
} 1~8F&
_/ j44q
private void mergeSort(int[] data, int[] temp, int l, int r) { L`FsK64@
int i, j, k; 7p3 ;b"'
int mid = (l + r) / 2; /:"%m:-P
if (l == r) +EG.p
return; Noz+\O\
if ((mid - l) >= THRESHOLD) 7c!oFwM
mergeSort(data, temp, l, mid); asP>(Li
else S;NChu?8
insertSort(data, l, mid - l + 1); i_g="^
if ((r - mid) > THRESHOLD) QNFA#`H
mergeSort(data, temp, mid + 1, r); 1pXAPTV
else ^q"p8
insertSort(data, mid + 1, r - mid); W6'+#Fp
.6!]RA5!=
for (i = l; i <= mid; i++) { !? ?Cxs'
temp = data; pTUsdao^,
} e;x`C
for (j = 1; j <= r - mid; j++) { <9-tA\`8N
temp[r - j + 1] = data[j + mid]; V)R-w`
} hw_7N)}
int a = temp[l]; X ~4^$x
int b = temp[r]; SynxMUlA
for (i = l, j = r, k = l; k <= r; k++) { ",E6)r
if (a < b) { IOF~V)8k=
data[k] = temp[i++]; d(,-13
a = temp; 5<IUTso5h
} else { /.'1i4Xa1P
data[k] = temp[j--]; R-`{W:S
b = temp[j]; Ec_ G9&
} [KWF7GQi
} |:!#kA
} tRbZ^5x\@
1}S_CR4XBs
/** po=*%Zs*T
* @param data ;}f%bE
* @param l ,~K_rNNZ
* @param i kKE2~ q
*/ 6e |
private void insertSort(int[] data, int start, int len) { LU?#{dZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'ZT!a]4
} \Zoo9Wy
} U@& <5'
} &o4L;A#&
} 54uTu2
UeHS4cW
堆排序： b@1QE
'U1r}.+b>
package org.rut.util.algorithm.support; ]Wd{4(b
<]wN/B-8J
import org.rut.util.algorithm.SortUtil; 7MGc+M(p
`9K'I-hv<8
/** L@a-"(TN+
* @author treeroot CdZ;ZR
* @since 2006-2-2 y9s5{\H
* @version 1.0 NLz$jk%=g
*/ Pv1psKu
public class HeapSort implements SortUtil.Sort{ KL5rF,DME
'c &Bmd40
/* (non-Javadoc) ,nHz~Xi1t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n1sH`C[c
*/ \re.KB#R
public void sort(int[] data) { >wMsZ+@m
MaxHeap h=new MaxHeap(); saRB~[6I
h.init(data); L~mL9[(,
for(int i=0;i h.remove(); xVl90ak
System.arraycopy(h.queue,1,data,0,data.length); "9WP^[
} yaX,s4p
;U7\pc;S
private static class MaxHeap{ #=O0-si]P
A<TJ3Jp]
void init(int[] data){ xE6y9"}!h
this.queue=new int[data.length+1]; |23 }~c,
for(int i=0;i queue[++size]=data; Nc"h8p?
fixUp(size); gdT^QM:y4$
} 3_ zI$Z
} \C<rg|
TTOd0a
private int size=0; yTDoS|B+)
Hb]7>[L
private int[] queue; M1ayAXO
8F[j}.8q
public int get() { Z].>U!7W
return queue[1]; Me`"@{r|#
} v5 9>
"3^6
public void remove() { 9J%>2AA
SortUtil.swap(queue,1,size--); Y]Fq)-
fixDown(1); 72{kig9c
} 4\$Ze0tv
file://fixdown w}(xs)`num
private void fixDown(int k) { {:oZ&y)Ac
int j; u>(Q& 25
while ((j = k << 1) <= size) { n!N;WL3k
if (j < size %26amp;%26amp; queue[j] j++; <wSmfg,yF
if (queue[k]>queue[j]) file://不用交换 .K7A!;
break; 96PVn
SortUtil.swap(queue,j,k); n>eIQaV
k = j; J-QQ!qa0
} HOUyB's'
} ! \gRXP}
private void fixUp(int k) { I{Kc{MXn
while (k > 1) { T.|0;Eb
int j = k >> 1; N%_~cR;
if (queue[j]>queue[k]) +<q^[<pS
break; , m\0IgZdz
SortUtil.swap(queue,j,k); $}F]pa[
k = j; T,IV)aq
} P"]+6sm&es
} JRiuU:=J~`
}(],*^'u-
} .o-j
/9yiMmr5W
} bFVdv&
pts}?
SortUtil： SKtEEFyIR_
7]^ }
package org.rut.util.algorithm; U'lD|R,g
[@y=%\%R
import org.rut.util.algorithm.support.BubbleSort; HcVPJuD
import org.rut.util.algorithm.support.HeapSort; ft*0?2N~
import org.rut.util.algorithm.support.ImprovedMergeSort; C>u 3n^
import org.rut.util.algorithm.support.ImprovedQuickSort; $%E9^F
import org.rut.util.algorithm.support.InsertSort; <s2l*mc
import org.rut.util.algorithm.support.MergeSort; czb%%:EJs|
import org.rut.util.algorithm.support.QuickSort; S]o
import org.rut.util.algorithm.support.SelectionSort; .J@[v
import org.rut.util.algorithm.support.ShellSort; '|/_='
X@Bpjg
/** ?rOb?cu-
* @author treeroot 3D.S[^s*
* @since 2006-2-2 p%ZiTrA1&D
* @version 1.0 /j)VES
*/ '?>eW2d
public class SortUtil { UbibGa= )
public final static int INSERT = 1; M+E5PZ|_
public final static int BUBBLE = 2; u7C{>
public final static int SELECTION = 3; < t (Pw
public final static int SHELL = 4; "[?/I3{E
public final static int QUICK = 5; h.9Lh ;j
public final static int IMPROVED_QUICK = 6; F^NR qE
public final static int MERGE = 7; ^sOm7S{
public final static int IMPROVED_MERGE = 8; nMa^Eq#
public final static int HEAP = 9; OT&E)eR
1b7xw#gLx
public static void sort(int[] data) { t(Zs*c(
sort(data, IMPROVED_QUICK); -Wn.@bz6B
} >YBpB,WND
private static String[] name={ ._&lG3'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iXm||?Rnx
}; oGVSy`ku
uBTT {GGQ
private static Sort[] impl=new Sort[]{ xs I/DW
new InsertSort(), Crhi+D
new BubbleSort(), (K6`nWk2
new SelectionSort(), Doh|G:P]#
new ShellSort(), c9uT`h
new QuickSort(), G; [AQ:Iy
new ImprovedQuickSort(), ]k:m2$le
new MergeSort(), 6)U&XWH0
new ImprovedMergeSort(), 3NN'E$"3
new HeapSort() 4LEE /
}; &&}5>kg>d
o1WidJ"
public static String toString(int algorithm){ Kyp0SZp[
return name[algorithm-1]; w;EXjl;X O
} dT)KvqX
unnx#e]
public static void sort(int[] data, int algorithm) { ?a>7=)%AH
impl[algorithm-1].sort(data); ' f$L
} z>33O5U
ewrWSffe
public static interface Sort { =_=Z;#`cXk
public void sort(int[] data); 1 j12Qn@]
} -+rF]|Wi
-t6R!ZI
public static void swap(int[] data, int i, int j) { UB$`;'|i
int temp = data; GD[ou.C}k
data = data[j]; X^D9)kel
data[j] = temp; s!'A\nVV1$
} N+M&d3H`
} `SjD/vNE