[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; v=!Ap ; 2L
} 6{h+(|.(
int i1=l; &0B<iO<f
int i2=mid+1; d&S4`\g?8
for(int cur=l;cur<=r;cur++){ /*g9drwaa
if(i1==mid+1) ~"\qX+
data[cur]=temp[i2++]; aq-`Bar
else if(i2>r) ut6M$d4
data[cur]=temp[i1++]; [NQ\(VQ1c
else if(temp[i1] data[cur]=temp[i1++]; 5f+ziiZ
else GA&mM
data[cur]=temp[i2++]; 5~(.:RX:q
} zJ;K4)"j
} HQi57QB
97"dOi!Wh
} u`E24~
YTBZklM
改进后的归并排序: 'qD5
ogN/zIU+VA
package org.rut.util.algorithm.support; zqEMR>px
Uh.XL=wY
import org.rut.util.algorithm.SortUtil; e">$[IhXtV
M%=V vE.I
/** !3~VoNh,
* @author treeroot &P8 Run
* @since 2006-2-2 @NBWNgBv
* @version 1.0 `c 3IS5
*/ ?O1:-vpZ
public class ImprovedMergeSort implements SortUtil.Sort { {0(:7IY,
-VK6Fq
private static final int THRESHOLD = 10; z4l O
q/w U7P\%
/* BoZG^
* (non-Javadoc) .E!p
* q|PB[*T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _!FM^N}|
*/ )tQG5.to
public void sort(int[] data) { X1*6qd+E
int[] temp=new int[data.length]; by*>w/@9)k
mergeSort(data,temp,0,data.length-1); JyPsRpi\
} 2N]u!S;d
U^_'e_)
private void mergeSort(int[] data, int[] temp, int l, int r) { .y7&!a35
int i, j, k; c"aiZ(aP
int mid = (l + r) / 2; j!r4p,
if (l == r) Ph&AP*Fq
return; 3[Pa~]yS
if ((mid - l) >= THRESHOLD) YxMOr\B
mergeSort(data, temp, l, mid); ]a% *$TF
else T!6H5>zA
insertSort(data, l, mid - l + 1); 1j*I`xZ
if ((r - mid) > THRESHOLD) '[shY
mergeSort(data, temp, mid + 1, r); %gd=d0vm
else gi`K^L=C
insertSort(data, mid + 1, r - mid); a!"81*&4#
)c@I|L
for (i = l; i <= mid; i++) { $[VeZ-
temp = data; DM6oMT
} o/I<)sa
for (j = 1; j <= r - mid; j++) { fShf4G_w\
temp[r - j + 1] = data[j + mid]; o{*8l#x8
} pL$UI3VCP
int a = temp[l]; 7>-y,?&
int b = temp[r]; I`h9P2~
for (i = l, j = r, k = l; k <= r; k++) { )Q 8T`Tly
if (a < b) { {]ZZ]
data[k] = temp[i++]; GE$spx
a = temp; R7us9qM4e
} else { v _Bu
data[k] = temp[j--]; a/+tsbw
b = temp[j]; k4_Fn61J/
} "s$v?voo
} 1Giy|;2/
} L K9vvQz
]*{QVn(
/** P,RCbPC4
* @param data g#ZR,q
* @param l 'l\V{0;mp
* @param i `gqBJi
*/ 9vL`|`Vau
private void insertSort(int[] data, int start, int len) { G8`q-B}q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LGT\1u
} e,zR
} /:>f$k4~h
} Ygn"7
} 2F-!SI
IS7g{:}=p
堆排序： DLE|ctzj[7
Kp"mV=RG2T
package org.rut.util.algorithm.support; ".| 9h
,_`\c7@
import org.rut.util.algorithm.SortUtil; KdFQlQaj
@Z!leyam
/** [(tgoh/
* @author treeroot tklU zv
* @since 2006-2-2 JGZ,5RTq4-
* @version 1.0 xMtl<Na
*/ ?n/:1LN,
public class HeapSort implements SortUtil.Sort{ ro37H2^Ty
xkl'Y*
/* (non-Javadoc) \Ja%u"DA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;9c3IK@
*/ oUZwZ_yKW
public void sort(int[] data) { ) 0$7{3
MaxHeap h=new MaxHeap(); 4UoUuKzt
h.init(data); pRXA!QfO
for(int i=0;i h.remove(); W<;i~W
System.arraycopy(h.queue,1,data,0,data.length); +8[h&
} @{.rDz
yuswWc'
private static class MaxHeap{ TEB%y9
sCaw"{5qc
void init(int[] data){ /exV6D r
this.queue=new int[data.length+1]; G5zZf~r
for(int i=0;i queue[++size]=data; ksY^w+>(!
fixUp(size); -w 2!k
} !'ajpK
} 5@j?7%_8
@okC":Fw,
private int size=0; a#!Vi93
'O]_A57
private int[] queue; /{7x|ay]
m&,d8Gss^
public int get() { 8,Yc1
return queue[1]; F$ Us! NN
} )aquf<u@
u4$d#0sA
public void remove() { dT,X8 "
SortUtil.swap(queue,1,size--); H1|X0a(j
fixDown(1); *we3i
} =0,")aa!
file://fixdown {exF"ap
private void fixDown(int k) { Du$kDCU
int j; \ ;Hj,z\
while ((j = k << 1) <= size) { >?M:oUVDU
if (j < size %26amp;%26amp; queue[j] j++; G#duZNBdc
if (queue[k]>queue[j]) file://不用交换 60~{sk~E
break; *~4uF
SortUtil.swap(queue,j,k); ekI1j%fO
k = j; =DE5Wq19
} 8[f]9P/i
} 4,FkA_k
private void fixUp(int k) { RNoS7[&
while (k > 1) { ]S,I}NP
int j = k >> 1; *v:+AE
if (queue[j]>queue[k]) a>sUq["
break; FO3!tJ\L
SortUtil.swap(queue,j,k); .IpwTke'
k = j; C_O7
} peGXU/5.I
} T>n,@?#K
1$@k@*u\
} GOH@|2N
&#.XLe\y
} G7%Nwe~Y
0g]ABzTn
SortUtil： lDp5aT;DsM
?xK9
package org.rut.util.algorithm; Yl8tjq}iC
)^%,\l-!
import org.rut.util.algorithm.support.BubbleSort; u9mMkzgSkP
import org.rut.util.algorithm.support.HeapSort; k>VP<Zm13
import org.rut.util.algorithm.support.ImprovedMergeSort; ),bdj+wr78
import org.rut.util.algorithm.support.ImprovedQuickSort; ^fnRzX
import org.rut.util.algorithm.support.InsertSort; n{Jvx>);
import org.rut.util.algorithm.support.MergeSort; AP3SOT3I
import org.rut.util.algorithm.support.QuickSort; ?_\Hv@t;
import org.rut.util.algorithm.support.SelectionSort; K+T`'J4
import org.rut.util.algorithm.support.ShellSort; LdWeI
/;HytFP
/** 3h0w8(k;
* @author treeroot FD_0FMZ9,
* @since 2006-2-2 Fhxg^
* @version 1.0 $6fHY\i#R
*/ _z,/!>J
public class SortUtil { Y0|~]J(B
public final static int INSERT = 1; p4{?Rhb6
public final static int BUBBLE = 2; Z`b,0[rG[
public final static int SELECTION = 3; (jY.S|%
public final static int SHELL = 4; + 6r@HK`,t
public final static int QUICK = 5; =5dv38
public final static int IMPROVED_QUICK = 6; K<Yh'RvTD
public final static int MERGE = 7; *XtZ;os]
public final static int IMPROVED_MERGE = 8; IA8kq =W
public final static int HEAP = 9; )4GfT
E6)FYz7x
public static void sort(int[] data) { Ku,Efr
sort(data, IMPROVED_QUICK); wZfR>|f
} &lI.N~Ao
private static String[] name={ n)`*{uv$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~Gwn||g78
}; zKfb
C6'[Tn
private static Sort[] impl=new Sort[]{ #"i}wS
new InsertSort(), -fUz$Df/R
new BubbleSort(), T'Jw\u>"R
new SelectionSort(), >@H:+0h-
new ShellSort(), 3: mF!
new QuickSort(), qViky=/-
new ImprovedQuickSort(), Y 3KCIL9
new MergeSort(), y0(k7D|\
new ImprovedMergeSort(), d9Rj-e1x
new HeapSort() vNE91
}; / d6mlQS
i7 p#%2
public static String toString(int algorithm){ }b\d CGVr
return name[algorithm-1]; ;'gzRC
} q%>L/KJ#
!7%L%~z^
public static void sort(int[] data, int algorithm) { k(VA5upCs
impl[algorithm-1].sort(data); aN;L5;m#>{
} ZV;#ZXch
D"A`b{z
public static interface Sort { OkzfQ hC}
public void sort(int[] data); cE]tvL:g
} #exE~@fy-
{_(;&\5
public static void swap(int[] data, int i, int j) { MIt\[EB
int temp = data; ,dh*GJ{5
data = data[j]; PjsQ+5[>
data[j] = temp; _V8pDcY
} 1Ll@ ocE
} 9^ mrsj