[JAVA]用Java实现的各种排序

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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; 5\e9@1Rc
} "tB;^jhRs
int i1=l; JKGc3j,+#
int i2=mid+1; Vm3v-=6
for(int cur=l;cur<=r;cur++){ rd9e \%A
if(i1==mid+1) $4/yZaVb
data[cur]=temp[i2++]; MhR:c7,
else if(i2>r) *.!Np9l,V
data[cur]=temp[i1++]; .Yf:[`Q6g
else if(temp[i1] data[cur]=temp[i1++]; VxVE
else #`o2Z
data[cur]=temp[i2++]; qNYN-f~@,
} ||;hciO
} <$X3Hye
BZR:OtR^
} 3wC' r
:.$3vaZ@
改进后的归并排序: }[4r4 1[
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package org.rut.util.algorithm.support; VzY8rI
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import org.rut.util.algorithm.SortUtil; ',:*f8Jk
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/** h"_MA_]~
* @author treeroot b/C`Jp
* @since 2006-2-2 X22[tqg;&
* @version 1.0 k +H3Bq
*/ :TJv=T'p'
public class ImprovedMergeSort implements SortUtil.Sort { jO!y_Y]B
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private static final int THRESHOLD = 10; R}q>O5O
r\/9X}y4z
/* UFp,a0|
* (non-Javadoc) oxz OA
* x "^Xj]-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P] UJ0b
*/ "4uS3h2r
public void sort(int[] data) { $`)/0{qY-
int[] temp=new int[data.length]; ug+io mZ
mergeSort(data,temp,0,data.length-1); MLRK74D
} xwJH(_-
X@K-^8
private void mergeSort(int[] data, int[] temp, int l, int r) { P!+'1KR
int i, j, k; cm&I* 0\
int mid = (l + r) / 2; J6L K
if (l == r) bO'Sgc[]
return; i`dCG[
if ((mid - l) >= THRESHOLD) QA5QweL
mergeSort(data, temp, l, mid); dIRm q+d^
else Qj.l:9%
insertSort(data, l, mid - l + 1); 4KH45|;3
if ((r - mid) > THRESHOLD) ~%SH3$
mergeSort(data, temp, mid + 1, r); C4~;yhz
else &?*V0luP)
insertSort(data, mid + 1, r - mid); %jJ>x3$F
9hOJvQ2U]
for (i = l; i <= mid; i++) { %we u 1f
temp = data; J|w\@inQ
} y5do1Z
for (j = 1; j <= r - mid; j++) { -Xxqm%([71
temp[r - j + 1] = data[j + mid]; pXJpK@z
} n#wI@W>%+
int a = temp[l]; .zn;:M#T
int b = temp[r]; Db;G@#x
for (i = l, j = r, k = l; k <= r; k++) { YRh BRE
if (a < b) { B,TB3 {
data[k] = temp[i++]; 6y6<JR-V2k
a = temp; 2Fq<*pxAY
} else { BPdfYu,il
data[k] = temp[j--]; o[cV1G
b = temp[j]; LAd\Tvms
} ,0hA'cp
} <-,gAk)u
} N(y\dL=v
3>R#zJf
/** %=/)
* @param data ~Uxsn@nLr
* @param l uoXAQ6k
* @param i L7VG`h;
*/ \>7^f 3m
private void insertSort(int[] data, int start, int len) { O }(VlR2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^V#@QPK9
} lsy?Ac
} GQ9\'z#+
} 7D!u1?]d{
} KN7n@$8YM
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堆排序： *X, /7C
@ ]/AjjLt
package org.rut.util.algorithm.support; %Mk0QKzUo
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import org.rut.util.algorithm.SortUtil; H Ge0hl[n
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/** Q)LM-ZJKQ
* @author treeroot Pri`K/
* @since 2006-2-2 <j5NFJ9
* @version 1.0 Oh'Y0_oB>
*/ %7gkNa
public class HeapSort implements SortUtil.Sort{ ,{LG4qvP
k&.Jk B"
/* (non-Javadoc) US%^#D q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DXa-rk8
*/ ~R&;v3
public void sort(int[] data) { #_(jS+lP?k
MaxHeap h=new MaxHeap(); 5JLu2P
h.init(data); #:^YI c
for(int i=0;i h.remove(); -$WYj"
System.arraycopy(h.queue,1,data,0,data.length); 1f8GW
} .F(i/)vaq|
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private static class MaxHeap{ ])Qs{hs~s
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void init(int[] data){ !ykx^z
this.queue=new int[data.length+1]; 9$|Gfyv
for(int i=0;i queue[++size]=data; vsr[ur[eP
fixUp(size); cg*)0U-_(
} a(v>Q*zNP
} !}r% u."
NN1$'"@NL
private int size=0; 6+KHQFb&N
R#DwF,
private int[] queue; I=.z+#Y
8G5m{XTS(
public int get() { hDp6YV,q
return queue[1]; N~NQ6:R[
} =?s3iP
Jte#ZnP
public void remove() { vMs$ceq
SortUtil.swap(queue,1,size--); '8T=~R6
fixDown(1); E4W zU
} LbZ:&/t^y8
file://fixdown w&B#goS
private void fixDown(int k) { ]<q[Do8k
int j; qg}O/K
while ((j = k << 1) <= size) { ?1[\!
if (j < size %26amp;%26amp; queue[j] j++; jD`d#R
if (queue[k]>queue[j]) file://不用交换 *r$+&8V\n
break; _!?Hu/zo
SortUtil.swap(queue,j,k); GR"Eas.$
k = j; Sf,R^9#|
} Eyh51IB.
} Q]w&N30
private void fixUp(int k) { \0H's{uek
while (k > 1) { +ke1Cn'[
int j = k >> 1; *mMEl]+
if (queue[j]>queue[k]) =pznu+,
break; pKjoi{ Z
SortUtil.swap(queue,j,k); wj1{M.EF\
k = j; pIKSs<IP
} FA}_(Hf.[
} .LuB\o$
QEu=-7@>
} ~35U]s@v
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} RNhJ'&SYs
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SortUtil： =Odv8yhn
x $zKzfHW
package org.rut.util.algorithm; S>0nx ^P
ZZ.m(ATR
import org.rut.util.algorithm.support.BubbleSort; D^-7JbE]
import org.rut.util.algorithm.support.HeapSort; Kmdlf,[3d
import org.rut.util.algorithm.support.ImprovedMergeSort; RJON90,J
import org.rut.util.algorithm.support.ImprovedQuickSort; cn- nj]
import org.rut.util.algorithm.support.InsertSort; k~|-gfFP
import org.rut.util.algorithm.support.MergeSort; a+9*@z2
import org.rut.util.algorithm.support.QuickSort; AT\qiznvP
import org.rut.util.algorithm.support.SelectionSort; xGG,2W+z
import org.rut.util.algorithm.support.ShellSort; _` [h,=
\J6hI\/4^
/** &V<W>Y>|l*
* @author treeroot 7oR:1DXw|
* @since 2006-2-2 ) 9oH,gZ
* @version 1.0 )#}mH@
*/ U7DCx=B
public class SortUtil { DtEwW1J
public final static int INSERT = 1; $L2%u8}8:
public final static int BUBBLE = 2; nxJee=qH
public final static int SELECTION = 3; !!:LJ
public final static int SHELL = 4; pMJ1v
public final static int QUICK = 5; hHPs&EA.p
public final static int IMPROVED_QUICK = 6; q,3;m[cA
public final static int MERGE = 7; xwH?0/
public final static int IMPROVED_MERGE = 8; $7'gRb4
public final static int HEAP = 9; {q3H5csFq
wM_ 6{
public static void sort(int[] data) { gXH[$guf
sort(data, IMPROVED_QUICK); kGUJ9Du
} vw)7 !/#
private static String[] name={ u?[ q=0.J7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3F#+~^2
}; Z^9/v
)C.yF)Ql
private static Sort[] impl=new Sort[]{ 3~qR
new InsertSort(), > QFHm5Jw
new BubbleSort(), 4\&
new SelectionSort(), x5Z-{"
new ShellSort(), )*5G">))p
new QuickSort(), i0s6aAhgJ
new ImprovedQuickSort(), zj|/ CxV
new MergeSort(), 3<?XTv-
new ImprovedMergeSort(), G8IY#
new HeapSort() T'fcc6D5p
}; Z.wA@ ~e
M@thI%lR
public static String toString(int algorithm){ 9F^;!
return name[algorithm-1]; A`u$A9[
} '?Jxt:<
e\b`n}nC
public static void sort(int[] data, int algorithm) { PjIeZ&p
impl[algorithm-1].sort(data); =D^TK-H
} s6}Xt=j
?QA\G6i4
public static interface Sort { !tHt,eJy
public void sort(int[] data); G^(}a]>9
} EHlytG}@
a?R[J==
public static void swap(int[] data, int i, int j) { Q8MS,7y/
int temp = data; m4[g6pNx~
data = data[j]; ?'r9"M>
data[j] = temp; 'lS`s(
} FhIqy %X
} vSW L$Y2