[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; /J)l/oI
} Jw~( G9G
int i1=l; rwIeqV{:
int i2=mid+1; i*R,QN)
for(int cur=l;cur<=r;cur++){ fri0XxF
if(i1==mid+1) mW%?>Z1=>d
data[cur]=temp[i2++]; kj5Q\vr)
else if(i2>r) BK,sc'b
data[cur]=temp[i1++]; l<(Y_PE:
else if(temp[i1] data[cur]=temp[i1++]; ":3 VJ(eY
else N)% ;jh:T
data[cur]=temp[i2++]; yk2!8
} 3\;27&~gV
} W(fr<<hL
v6\F Q9|t
} p1c3Q$>i
(J"T]-[
改进后的归并排序: I|$ RJkD
}B7K@Wu#
package org.rut.util.algorithm.support; G1 o70
^7]"kg DA
import org.rut.util.algorithm.SortUtil; fQ>4MKLw=d
QH]M
/** ~tB;@e
* @author treeroot .ut{,(5
* @since 2006-2-2 t0:AScZY
* @version 1.0 7 1W5.!
*/ Fyyg`J
public class ImprovedMergeSort implements SortUtil.Sort { {5*|C-WWtG
XS~- vF
private static final int THRESHOLD = 10; 0^'B3$>
0i[zup
/* \bCX=E-
* (non-Javadoc) =rPrPb
* Kt>X[o3m,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~#\i!I;RY}
*/ 6pE :A@
public void sort(int[] data) { h x6;YV
int[] temp=new int[data.length]; !S%6Uzsj
mergeSort(data,temp,0,data.length-1); S~$'WA
} :PbDU$x
[=*E+Oc
private void mergeSort(int[] data, int[] temp, int l, int r) { ihT~xt
int i, j, k; rg(lCL&:S
int mid = (l + r) / 2; Uh.Zi3X6}6
if (l == r) +)nT|w45
return; !\[+99F#
if ((mid - l) >= THRESHOLD) ~`Qko-a&
mergeSort(data, temp, l, mid); tNs~M4TVVH
else #y]3LC#)^G
insertSort(data, l, mid - l + 1); U3vEdw<lV
if ((r - mid) > THRESHOLD) RaSz>-3d
mergeSort(data, temp, mid + 1, r); e2$]g>
else .V6-(d
insertSort(data, mid + 1, r - mid); E& 36H
A CNfS9M_w
for (i = l; i <= mid; i++) { [AEBF2OIv
temp = data; TY;U2.Ud
} NCA{H^CL
for (j = 1; j <= r - mid; j++) { @D`zKYwX1
temp[r - j + 1] = data[j + mid]; D y6$J3 r
} N$?cX(|7
int a = temp[l]; !Q-wdzsp?
int b = temp[r]; V9x8R
for (i = l, j = r, k = l; k <= r; k++) { $mco0%$
if (a < b) { zvv:dC/p<
data[k] = temp[i++]; )He#K+[}^4
a = temp; fm1X1T.
} else { dw@E)
data[k] = temp[j--]; qUhRu>
b = temp[j]; . ,NB( s`
} KiLvI,9y
} ;~HNpu$
} 1H:ea7YVU
oL/o*^
/** (U.**9b;
* @param data FYPz 4K
* @param l E(+T*
* @param i )&W|QH=AI
*/ ^>~dlS
private void insertSort(int[] data, int start, int len) { dhRJg"vrQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7INk_2
} >3;^l/2c
} ](r ^.k,R
} OsW"CF2
} HOYq?40.R
5!fSW2N
堆排序： #G_/.h@
x;$|#]+
package org.rut.util.algorithm.support; ]S8LY.Az5
n~z\?Y=*
import org.rut.util.algorithm.SortUtil; G=M] 8+h
0V11#
/** -oBI+v&
* @author treeroot AfWl6a?T8:
* @since 2006-2-2 rFag@Z"["
* @version 1.0 :q2YBa
*/ K, (65>86;
public class HeapSort implements SortUtil.Sort{ 993d/z|DX
Y4~vC[$x'
/* (non-Javadoc) y{rn-?`{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C@dGWAG
*/ F%6*Df;cSe
public void sort(int[] data) { #0MK(Ut/
MaxHeap h=new MaxHeap(); `6 Y33bQ
h.init(data); xcSR{IZ
for(int i=0;i h.remove(); >7-y#SkXdo
System.arraycopy(h.queue,1,data,0,data.length); SR*Gqx
} 9EgP9up{6!
{Qtq7q.
private static class MaxHeap{ :k!j"@r
i^%-aBZ
void init(int[] data){ eYP=T+
this.queue=new int[data.length+1]; ]UUI~sFE
for(int i=0;i queue[++size]=data; 7u%a/<
fixUp(size); IlHY%8F{
} kJ8vKcc
} yuNfhK/#r
:4;S"p
private int size=0; <%!J?
.:0M+Jr"
private int[] queue; 7~.ZE
HCc`
public int get() { ]t/f<jKN^
return queue[1]; :::>ro*R
} 5-p.MGso
CX+9R3pa
public void remove() { g3rRhS
SortUtil.swap(queue,1,size--); 7z<Cu<
fixDown(1); QFzFL-H~N
} Yn1?#%%
file://fixdown VN|G5*
private void fixDown(int k) { a>b8-j=J
int j; Qq0O0U
while ((j = k << 1) <= size) { P3$,ca'
if (j < size %26amp;%26amp; queue[j] j++; IxP^i{/1?
if (queue[k]>queue[j]) file://不用交换 A7'bNd6f9
break; "]<}Hy
SortUtil.swap(queue,j,k); 1l]C5P}E
k = j; STlPT5e.}
} 4$i}Xk#3
} oWD)+5.]
private void fixUp(int k) { t&f" jPu>
while (k > 1) { cj^bh
int j = k >> 1; L1MrrC
if (queue[j]>queue[k]) !w=,p.?V=
break; 6h@+?{F.
SortUtil.swap(queue,j,k); $`Rxn*}V4#
k = j; JjDS"hK#
} @Z=wE3T@
} Oo/8Y E@
RO$*G jQd
} j]4,6`b\
'RQiLUF
} \P?--AIq<
bZXlJa`'S
SortUtil： Bn_g-WrT
IdmD.k0pJ
package org.rut.util.algorithm; zi_[V@Es/
`OLB';D
import org.rut.util.algorithm.support.BubbleSort; rT<1S?jR
import org.rut.util.algorithm.support.HeapSort; } Ab_o#Zy
import org.rut.util.algorithm.support.ImprovedMergeSort; 6>lW5U^yA\
import org.rut.util.algorithm.support.ImprovedQuickSort; 'F<Sf:?.p
import org.rut.util.algorithm.support.InsertSort; 5E.vje{U;
import org.rut.util.algorithm.support.MergeSort; U5clQiow
import org.rut.util.algorithm.support.QuickSort; iW-t}}Z>B
import org.rut.util.algorithm.support.SelectionSort; dL(4mR8
import org.rut.util.algorithm.support.ShellSort; D0KELAcY
]eD[4Y\#t
/** }M="oN~w
* @author treeroot YZ{;%&rB
* @since 2006-2-2 d>~`j8,B
* @version 1.0 e~*S4dKR
*/ Ss+F9J
public class SortUtil { LiF.w:}
public final static int INSERT = 1; ^Wk0*.wg
public final static int BUBBLE = 2; R1~7F{FW
public final static int SELECTION = 3; ]Qc: Zy3
public final static int SHELL = 4; X)y*#U
public final static int QUICK = 5; MKe *f%
public final static int IMPROVED_QUICK = 6; I'P.K| "R
public final static int MERGE = 7; P1e5uJkd
public final static int IMPROVED_MERGE = 8; ~"\P~cg0J
public final static int HEAP = 9; .;j"+Ef
y "<JE<X
public static void sort(int[] data) { . *Z#cq0
sort(data, IMPROVED_QUICK); F-i&M1\_
} 78gob&p?
private static String[] name={ eNivlJ,K|@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <%(f9j
}; i'9eKO
7~L|;^(
private static Sort[] impl=new Sort[]{ %va[jJ
new InsertSort(), U<|B7t4M
new BubbleSort(), "hfw9Qm
new SelectionSort(), 4bWfx_0W
new ShellSort(), }el,^~
new QuickSort(), &4[<F"W>47
new ImprovedQuickSort(), `c>A>c|
new MergeSort(), Aw5K3@Ltz
new ImprovedMergeSort(), [10$a(g\x
new HeapSort() rC~_:uXtE
}; E=3#TBd
\?[O,A
public static String toString(int algorithm){ Jr|K>
return name[algorithm-1]; YALyZ.d
} w:n(pLc<
Un~]Q?w
public static void sort(int[] data, int algorithm) { z)r8?9u
impl[algorithm-1].sort(data); \gjl^#;
} /Lj%A
^9n}-Cqeq
public static interface Sort { D~XU`;~u
public void sort(int[] data); 7Z9.z4\
} "hJ7 Vv_
01'y^`\xQ
public static void swap(int[] data, int i, int j) { |yuGK
int temp = data; V#+126
data = data[j]; _3*: y/M_
data[j] = temp; e_tZja2s
} iz,]%<_PE
} l A 0-?k