[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; u3wd~.
} bH'2iG
int i1=l; &2q<#b
int i2=mid+1; zx.SRs$
for(int cur=l;cur<=r;cur++){ "sY}@Q7
if(i1==mid+1) b+hN\/*]
data[cur]=temp[i2++]; @qx$b~%
else if(i2>r) 8ZCA vEy
data[cur]=temp[i1++]; ]gaeN2
else if(temp[i1] data[cur]=temp[i1++]; )vVf- zU
else WQD:~*C:
data[cur]=temp[i2++]; 6uUn
} Z*h}E
} fZ;}_wR-H
G8/q&6f_
} \$ss
8_S| 8RW(
改进后的归并排序: .j**>&7L
elpTak@
package org.rut.util.algorithm.support; +Kg }R5+
{{gt>"D,
import org.rut.util.algorithm.SortUtil; T-/3 A%v
FCKyKn
/** k9:|CEP
* @author treeroot 49}WJC7 )
* @since 2006-2-2 , `EOJ"|
* @version 1.0 aD_7^8>
*/ a1%}Ee
public class ImprovedMergeSort implements SortUtil.Sort { wrXn|aV
}_^ vvu
private static final int THRESHOLD = 10; I'p+9H$
}4h0{H
/* :2C <;o
* (non-Javadoc) >Q[ Z{
* |k%1mE(+=s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5ddfdIp
*/ S'NLj(
public void sort(int[] data) { ]IeLKcn
int[] temp=new int[data.length]; gMkSl8[
mergeSort(data,temp,0,data.length-1); V d]7v
} |GsMLY:0
WXDo`_{R
private void mergeSort(int[] data, int[] temp, int l, int r) { `Lavjmfr2V
int i, j, k; KtH^k&z.f
int mid = (l + r) / 2; qK9A /Mc
if (l == r) d~h;|Bl[
return; pLV %g#h
if ((mid - l) >= THRESHOLD) |3Oyg?2
mergeSort(data, temp, l, mid); M7 kWJ
else a)Pr&9I
insertSort(data, l, mid - l + 1); .c0u##/0
if ((r - mid) > THRESHOLD) U[8F{LX
mergeSort(data, temp, mid + 1, r); ^&8hhxCPu|
else {~s\a2YH
insertSort(data, mid + 1, r - mid); I;eoy,
X-,oL.:c
for (i = l; i <= mid; i++) { @7.7+blS"H
temp = data; r3-<~k-
} PB5h5eX
for (j = 1; j <= r - mid; j++) { .]JIo&>5
temp[r - j + 1] = data[j + mid]; k*\)z\f
} gFu,q`Vf*
int a = temp[l]; J]{<Z?%
int b = temp[r]; z,2*3Be6V
for (i = l, j = r, k = l; k <= r; k++) { $ Y^0l
if (a < b) { p4UEhT
data[k] = temp[i++]; e5n]@mu%
a = temp; <mVFC
} else { 3 v.8
data[k] = temp[j--]; V3r)u\ o'
b = temp[j]; n00J21
} _<Ij)#Rq7
} >D}|'.&
} Q.h.d))
dGkw%3[
/** 8e,F{>N
* @param data )Ho"b
* @param l KZVdW@DY
* @param i 4>vO9q
*/ j6XHH&ZEb
private void insertSort(int[] data, int start, int len) { m.1-[2{8~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X#ud5h
} v>Kh5H5e~
} g;6/P2w
} B, H9EX
} D_~;!^
-;&I S
堆排序： ZX1/6|_
"Y&
package org.rut.util.algorithm.support; /~f[>#
lBs-u h
import org.rut.util.algorithm.SortUtil; ABkDOG2br
YZSQOLN{
/** Ldv,(ZV,<
* @author treeroot o$+R
* @since 2006-2-2 -1v9
* @version 1.0 r Dlu&
*/ 6DK).|@$r
public class HeapSort implements SortUtil.Sort{ UntFkoO
{Q_GJ
/* (non-Javadoc) a7F_{Mm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $;Iz7:#jN
*/ Jvsy 6R
public void sort(int[] data) { xU0iz{9
MaxHeap h=new MaxHeap(); ^"54Q^SH
h.init(data); |uw48*t
for(int i=0;i h.remove(); r^<,f[yH
System.arraycopy(h.queue,1,data,0,data.length); V&vG.HAT
} V\{@c%xW
M<*Tp^Y'
private static class MaxHeap{ ~OPBZ#
ytjZ7J['{
void init(int[] data){ [MwL=9;!H
this.queue=new int[data.length+1]; {#,5C H')
for(int i=0;i queue[++size]=data; t&=bW<6
fixUp(size); rr1'| k"
} /HhA2 (g%
} fKqr$59>
ipp`99
private int size=0; X{,mj"(w
ex1!7A!}g
private int[] queue; ly0L)L]\
&oB*gGRw=7
public int get() { xR&:]M[Vg
return queue[1]; 26nwUNak
} N0kCdJv
)j~{P
public void remove() { W)/f5[L
SortUtil.swap(queue,1,size--); 8~R.iqLoX
fixDown(1); p#]9^oA
} <3@nv%
file://fixdown !-470J
private void fixDown(int k) { F1-"yX1B
int j; 7z1@XO<D
while ((j = k << 1) <= size) { LmqSxHs0Q
if (j < size %26amp;%26amp; queue[j] j++; 'h'pM#D
if (queue[k]>queue[j]) file://不用交换 hp(MKfhH
break; ,\P|%yv
SortUtil.swap(queue,j,k); D})/2O p
k = j; 'l~7u({u
} Kb<c||2Nh5
} ]1d)jWG
private void fixUp(int k) { _BJ:GDz>
while (k > 1) { d$bO.t5CLh
int j = k >> 1; P![ZO6`:W'
if (queue[j]>queue[k]) gL&w:_
break; Tc||96%2^
SortUtil.swap(queue,j,k); vnQFq
k = j; f~a 7E;y
} e.DN,rhqI
} %#v$d
6wwbH}*=?
} NcF>}f,}\
$3>Rw/,
} %po;ih$jr*
S}U_uZ$b
SortUtil： Y 'X!T8
"i/GzD7`n
package org.rut.util.algorithm; hDW_a y4
$#s5y~z
import org.rut.util.algorithm.support.BubbleSort; sGtxqnX:J
import org.rut.util.algorithm.support.HeapSort; BV>9U5
import org.rut.util.algorithm.support.ImprovedMergeSort; /]Y#*r8jRi
import org.rut.util.algorithm.support.ImprovedQuickSort; v@[3R7|4
import org.rut.util.algorithm.support.InsertSort; \9V_[xD+
import org.rut.util.algorithm.support.MergeSort; m]MR\E5]By
import org.rut.util.algorithm.support.QuickSort; 5Wa)_@qI)`
import org.rut.util.algorithm.support.SelectionSort; ^[m-PS(
import org.rut.util.algorithm.support.ShellSort; >"<s7$g
Nh^I{%.x
/** !9$}1_,is
* @author treeroot :M{ )&{D
* @since 2006-2-2 HP[B%
* @version 1.0 {-me;ayk
*/ O4oN)
public class SortUtil { 'R+^+urq^
public final static int INSERT = 1; VpHwc!APq
public final static int BUBBLE = 2; DGCvH)Q
public final static int SELECTION = 3; ((`{-y\K
public final static int SHELL = 4; lrKT?siB
public final static int QUICK = 5; ;0oL*d[1Z
public final static int IMPROVED_QUICK = 6; JB'tc!!*
public final static int MERGE = 7; Ji!i}UjD7!
public final static int IMPROVED_MERGE = 8; i_AD3Jrs
public final static int HEAP = 9; i>h3UIx\
O*?^a7Z)4
public static void sort(int[] data) { 5ILKYUg,
sort(data, IMPROVED_QUICK); ^i_v\E[QU
} sgK =eBE
private static String[] name={ w2'z~\dG8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z'k?lkB2i
}; 2'M5+[8y8
]3*w3Y!XK
private static Sort[] impl=new Sort[]{ vW*Mf}=
new InsertSort(), RPeH[M^
new BubbleSort(), v*GS>S
new SelectionSort(), Zh;}Q(w
new ShellSort(), t6KKfb
new QuickSort(), > _sSni
new ImprovedQuickSort(), Eb9h9sjv
new MergeSort(), i{$P.i/&
new ImprovedMergeSort(), H9TeMY
new HeapSort() ",gVo\^
}; fmv:vs /9
w)vpo/?
public static String toString(int algorithm){ vmkiw1
return name[algorithm-1]; )#\3c,<Y
} Z.@n7G
LXby(|<j
public static void sort(int[] data, int algorithm) { L9Zz-Dr s
impl[algorithm-1].sort(data); Gd\/n*j
} db1ZNw
m ne)c[Qn
public static interface Sort { Z|a*"@5_
public void sort(int[] data); $04lL/;
} A#I&&qZ
^C^I
public static void swap(int[] data, int i, int j) { _)Txg2?=
int temp = data; <$A/ ('
data = data[j]; {N{eOa<HA
data[j] = temp; (oy@j{G)c6
} ojBdUG\
} LNk :PD0m