[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; wKAc ;!
} #G ZGk?
int i1=l; W|kKH5E&
int i2=mid+1; `5Qo*qx
for(int cur=l;cur<=r;cur++){ Y;'7Ek)
if(i1==mid+1) Ot} E
data[cur]=temp[i2++]; pYs"Y;%
else if(i2>r) D~Y3\KP
data[cur]=temp[i1++]; m<;&B
else if(temp[i1] data[cur]=temp[i1++]; \YBY"J
else uB:utg
data[cur]=temp[i2++]; 9m fYB
} B/CP/Pfb
} 7MT[fA8^
DjjG?(1
} [sY>ac
MW+]w~7_Q
改进后的归并排序: =kvYE,,g_
<3>Ou(F
package org.rut.util.algorithm.support; LPk85E
i=<N4Vx
import org.rut.util.algorithm.SortUtil; @BN cIJk9
NY ZPh%x
/** 5xHl6T+
* @author treeroot eID"&SSU
* @since 2006-2-2 %o+VZEH3
* @version 1.0 |!)3[<.
*/ `1KZ14K
public class ImprovedMergeSort implements SortUtil.Sort { *r+i=i8{
|:tFQ.Z'2
private static final int THRESHOLD = 10; s Hu~;)
+S:(cz80V
/* ;%#@vXH[Oo
* (non-Javadoc) wYS,|=y
* ht S5<+Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cj}1 )qWq
*/ vF;%#P
public void sort(int[] data) { Px}#{fkS
int[] temp=new int[data.length]; M>~jLu0@
mergeSort(data,temp,0,data.length-1); c)M_&?J!5
} R gEKs"e
kG+CT
private void mergeSort(int[] data, int[] temp, int l, int r) { n5%rsNxg
int i, j, k; ;#!`cgAh
int mid = (l + r) / 2; G)?O!(_
if (l == r) J%;TK6
return; %?C{0(Z{
if ((mid - l) >= THRESHOLD) H>`?S{J
mergeSort(data, temp, l, mid); 59p'Ega.
else fdN-Zq@'
insertSort(data, l, mid - l + 1); l0b Y
if ((r - mid) > THRESHOLD) ]RQQg,|D
mergeSort(data, temp, mid + 1, r); OXzJ%&h
else (6?pBdZ
insertSort(data, mid + 1, r - mid); "S^;X @#v
'UT 4x9&z
for (i = l; i <= mid; i++) { <Dt,FWWkv'
temp = data; lvb0dOmY
} PS@` =Z
for (j = 1; j <= r - mid; j++) { X{ZBS^M
temp[r - j + 1] = data[j + mid]; EZc!QrY
} r%$-F2.p
int a = temp[l]; zie])_8|h
int b = temp[r]; ][6$$Lz
for (i = l, j = r, k = l; k <= r; k++) { HH2*12e
if (a < b) { [cru+c+O:
data[k] = temp[i++]; ."PR Z,
a = temp; ALwkX"AN
} else { v)+wr[Qs
data[k] = temp[j--]; M&y!w
b = temp[j]; ?U2ed)zzw
} RWXj)H)w
} n\.K:t[:
} As1Er[>
?'$=G4y&?
/** OgS6#X
* @param data x"v5'EpL
* @param l _d]w)YMO
* @param i 5}~*,_J2Z
*/ i,FG?\x@
private void insertSort(int[] data, int start, int len) { ~7b'4\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1p23&\\~
} <k5FlvE2
} ]<4Yor}t{;
} AzN.vA)q
} JXGIVH?Rpu
&.+[~2
堆排序： 6k42>e*p
[lQp4xgxi
package org.rut.util.algorithm.support; 3>0/WbA:7E
,^,Vq]$3
import org.rut.util.algorithm.SortUtil; -t?S:9[w
nPfVZGt
/** /pFg<
* @author treeroot \"_;rJ{!aE
* @since 2006-2-2 8:L%-
* @version 1.0 W&z.O
*/ 8S@ ~^D
public class HeapSort implements SortUtil.Sort{ 5 &-fX:/
H4KwbTT"+
/* (non-Javadoc) \@['V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "a5?cX;
*/ ^P:9iu)+]~
public void sort(int[] data) { vjZX8KAiZ
MaxHeap h=new MaxHeap(); K,|Gtaa~
h.init(data); 0FjSa\ZH
for(int i=0;i h.remove(); |j^>6nE
System.arraycopy(h.queue,1,data,0,data.length); 6VQ*z8wLw
} d~S.PRg=
=NF},j"
private static class MaxHeap{ ]Vl*!,(i
z mrk`o~
void init(int[] data){ C n\'sb{
this.queue=new int[data.length+1]; W5_t/_EWD
for(int i=0;i queue[++size]=data; }.o rfW
fixUp(size); yXppu[=
} 5$GE3IER8
} \KLWOj%
rNfua
private int size=0; :5U(}\dL{
Z?XE~6aP>
private int[] queue; V{{b^y
I@+dE V`Lf
public int get() { 8Th|'
return queue[1]; `"zX<
} O#Xq0o
b,KQG|k
public void remove() { ZaH<\`=%
SortUtil.swap(queue,1,size--); m,Q<4'
fixDown(1); T"in
} h+,zfVJu
file://fixdown {{SQL)yJ
private void fixDown(int k) { @]Iku6d-
int j; PM7*@~.
while ((j = k << 1) <= size) { `Kpn@Xg
if (j < size %26amp;%26amp; queue[j] j++; E:&=A 4%
if (queue[k]>queue[j]) file://不用交换 Z7K;~*
break; BGLJ>zkq
SortUtil.swap(queue,j,k); asj^K|.z
k = j; k/j]*~"
} d01bt$8>
} V. =!^0'A
private void fixUp(int k) { 6n
while (k > 1) { :f 1*-y
int j = k >> 1; ::9U5E;!
if (queue[j]>queue[k]) dL |D
break; G9N6iKP!
SortUtil.swap(queue,j,k); #)GL%{Oa
k = j; *S:^3{.m=
} lyF~E
} -PBm@}*
9p+DAs{i
} jC@$D*"J
eqZ V/a
} A%k@75V@
s34{\/'D+
SortUtil： k9.@S
9K@`n:Rw
package org.rut.util.algorithm; {tOu+zy
*q=pv8&*s
import org.rut.util.algorithm.support.BubbleSort; Q\<C9%a
import org.rut.util.algorithm.support.HeapSort; #[qmhU{s
import org.rut.util.algorithm.support.ImprovedMergeSort; g"`BNI]Qp
import org.rut.util.algorithm.support.ImprovedQuickSort; (5cc{zKtR
import org.rut.util.algorithm.support.InsertSort; Rd&2mL
import org.rut.util.algorithm.support.MergeSort; O B_g:T
import org.rut.util.algorithm.support.QuickSort; i,8h B(M!
import org.rut.util.algorithm.support.SelectionSort; ;;2XLkWu
import org.rut.util.algorithm.support.ShellSort; ]p\7s
}/4 AT
/** :p;!\4)u
* @author treeroot lr=? &>MXj
* @since 2006-2-2 eY-W5TgU
* @version 1.0 Zz!XH8sH
*/ o:.={)rX
public class SortUtil { g"EvMv&
public final static int INSERT = 1; |cEJRs@B
public final static int BUBBLE = 2; -Ds}kdxw
public final static int SELECTION = 3; 3%bCv_6B
public final static int SHELL = 4; }TzMWdT
public final static int QUICK = 5; ~pO6C*"
public final static int IMPROVED_QUICK = 6; }%c2u/PQ
public final static int MERGE = 7; E/v.+m
public final static int IMPROVED_MERGE = 8; JF!JY( U,
public final static int HEAP = 9; ]>tYU
LBq~?Q.e
public static void sort(int[] data) { ]JVs/
sort(data, IMPROVED_QUICK); )a AKO`
} ~Z9Eb|B
private static String[] name={ 9]<p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eee77.@y-p
}; {_&'tXL
#` Q3Z}C
private static Sort[] impl=new Sort[]{ 48hu=,)81*
new InsertSort(), ,m;S-Im_Xr
new BubbleSort(), $N'AZY]4]
new SelectionSort(), 8n+&tBq1
new ShellSort(), G0oY`WXOB
new QuickSort(), 3=5K7F
new ImprovedQuickSort(), 5\gL+qM0
new MergeSort(), Yz(k4K L
new ImprovedMergeSort(), ~P8 6=Vw
new HeapSort() f!%G{G^`
}; Veo*-sl
Aslh}'$}-
public static String toString(int algorithm){ U_i%@{
return name[algorithm-1]; \UA\0p
} 8mjPa^A
Yv<'QC
public static void sort(int[] data, int algorithm) { =lT~
impl[algorithm-1].sort(data); a~q_2S]h
} R[KF${X4
h DpIwzJ
public static interface Sort { !~Vo'ykwx'
public void sort(int[] data); wNo2$>*
} l r80RL'_
/kV3[Rw+
public static void swap(int[] data, int i, int j) { 'NJGez'b,
int temp = data; \d"JYym
data = data[j]; R=&9M4
data[j] = temp; KYE)#<V}@
} lS@0 $
} \ #<.&`8B