[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; vM:c70=
} N]\)Ok
int i1=l; r!|h3*YA
int i2=mid+1; 2 ksbDl}
for(int cur=l;cur<=r;cur++){ )/2TU]//
if(i1==mid+1) j}fSz)`i
data[cur]=temp[i2++]; q_"w,28
else if(i2>r) Ies` !W^
data[cur]=temp[i1++]; OO,EUOh-T:
else if(temp[i1] data[cur]=temp[i1++]; bPV;"
else -q&,7'V
data[cur]=temp[i2++]; ,F "P/`i'
} Wo,93]
} 0;4 YU%u
Qx_N,1>S
} TnQW~_:
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改进后的归并排序: = U[$i"+
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package org.rut.util.algorithm.support; ^a1k"|E?f
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import org.rut.util.algorithm.SortUtil; 3bQq Nk
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/** /1Ss |.
* @author treeroot N0 mhgEA
* @since 2006-2-2 <KI>:@|Sc
* @version 1.0 cu)B!#<!&
*/ 1hc`s+N
public class ImprovedMergeSort implements SortUtil.Sort { O.-A)S@
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private static final int THRESHOLD = 10; X|}Q4T`
`v'yGsIV
/* lc]cs D
* (non-Javadoc) W[>qiYf^b
* yDj'')LOQg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7=&+0@R#/d
*/ ;*=7>"o'`
public void sort(int[] data) { K%u>'W
int[] temp=new int[data.length]; v`p@djM
mergeSort(data,temp,0,data.length-1); +Z]}ce u"
} 4i<GqG
$P2*qpqy
private void mergeSort(int[] data, int[] temp, int l, int r) { tC.etoh
int i, j, k; !HeQMz
int mid = (l + r) / 2; 2~vvE
if (l == r) +&E\w,Vq^
return; p=|S%
if ((mid - l) >= THRESHOLD) BQs\!~Ux2
mergeSort(data, temp, l, mid); !"'6$"U\K
else z<J2e^j
insertSort(data, l, mid - l + 1); RS@G.|
if ((r - mid) > THRESHOLD) :u)Qs#'29
mergeSort(data, temp, mid + 1, r); YHxQb$v)
else uh>"TeOi
insertSort(data, mid + 1, r - mid); - Nt8'-
B$S@xD $
for (i = l; i <= mid; i++) { ~~Rq$'q}
temp = data; |Nadk(}
} [/<kPi
for (j = 1; j <= r - mid; j++) { <)Y jVGG
temp[r - j + 1] = data[j + mid]; <Ynrw4[)t
} ~n(LBA
int a = temp[l]; `\/\C[Gg
int b = temp[r]; $FZcvo3@*S
for (i = l, j = r, k = l; k <= r; k++) { B$7Cjv
if (a < b) { y k\/Cf
data[k] = temp[i++]; +x~p&,w?
a = temp; 0oqOX
} else { vJsg6oH
data[k] = temp[j--]; 7$8DMBqq
b = temp[j]; -M4VC^_
} =-qYp0sVP
} $if(n||
} rX)_!mR
]u:Ij|.'y0
/** _94R8?\_V7
* @param data w$""])o,
* @param l $4^h>x
* @param i _lC0XDZ
*/ "{c@}~
private void insertSort(int[] data, int start, int len) { CioS}K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \6pQ&an
} Gh<#wa['}
} #F6M<V'
} BJ5^-|
} ofsLx6Po
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堆排序： !P":z0K4
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package org.rut.util.algorithm.support; /J(~NGT
:?>yi7w
import org.rut.util.algorithm.SortUtil; ZmJ<FF4
OM`Ws5W}f
/** ~D`
* @author treeroot U99Uny9
* @since 2006-2-2 Cm0K-~ U
* @version 1.0 FV/lBWiQQ
*/ uC[F'\Y
public class HeapSort implements SortUtil.Sort{ 0C6T>E7
7y$U$6
/* (non-Javadoc) 3FMYs&0r4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Cj3\G4,
*/ 9V;A+d,
public void sort(int[] data) { Or55_E
MaxHeap h=new MaxHeap(); E5a7p.
h.init(data); L[U?{
for(int i=0;i h.remove(); AtqsrYj
System.arraycopy(h.queue,1,data,0,data.length); pr1kYMrqri
} \FnR'ne
jLw|F-v-l<
private static class MaxHeap{ -U;=]o1
jHV) TBr
void init(int[] data){ zhY]!
this.queue=new int[data.length+1]; Lzx/9PPYn
for(int i=0;i queue[++size]=data; N9u {)u
fixUp(size); 4E$d"D5]>p
} \{qtdTd
} +F>erdV
Z@AN0?,`~o
private int size=0; 7Jpq7;
AE Abny q
private int[] queue; V@\u<LO0G
c<{~j~+
public int get() { cs[nFfM
return queue[1]; `H9!Z$7G
} OU*skc>
j@4]0o
public void remove() { mILCC}Kt
SortUtil.swap(queue,1,size--); f?(g5o*2
fixDown(1); is^5TL%@
} 4.>y[_vu
file://fixdown J?1Eh14KZ
private void fixDown(int k) { *|gl1S
int j; P~PM$e
while ((j = k << 1) <= size) { &<cP{aBa
if (j < size %26amp;%26amp; queue[j] j++; d^0-|sx
if (queue[k]>queue[j]) file://不用交换 E#cu}zi
break; b{ tp qNm~
SortUtil.swap(queue,j,k); t7*F,
k = j; lk=[Xo
} Yqv!ZJ6
} O@skd2
private void fixUp(int k) { mqY=N~/O
while (k > 1) { gb}ov**
int j = k >> 1; cb/$P!j7
if (queue[j]>queue[k]) qV-1aaA
break; uX6rCokr
SortUtil.swap(queue,j,k); Ml)<4@
k = j; sXY{g0%
} o?aF
} gOp81)
a;&0u>
} TeyFq0j@'
l vBcEg
} Vygh|UEo
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SortUtil： /sqfw,h@
+Q"XwxL<6
package org.rut.util.algorithm; qVvnl
fe}RmnAC
import org.rut.util.algorithm.support.BubbleSort; "kKIv|`
import org.rut.util.algorithm.support.HeapSort; l>("L9
import org.rut.util.algorithm.support.ImprovedMergeSort; -.-@|*5
import org.rut.util.algorithm.support.ImprovedQuickSort; 4z^~,7J^
import org.rut.util.algorithm.support.InsertSort; 5H( ]"C
import org.rut.util.algorithm.support.MergeSort; w*u.z(:a`
import org.rut.util.algorithm.support.QuickSort; iL~(BnsF
import org.rut.util.algorithm.support.SelectionSort; _j~y;R)
import org.rut.util.algorithm.support.ShellSort; !|cM<}TF,
:\%hv>}|
/** B|=S-5pv*
* @author treeroot Qh]k)]+*|
* @since 2006-2-2 V2g"5nYT
* @version 1.0 \\Z?v,XsS
*/ }$* z:E
public class SortUtil { 46H@z=5
public final static int INSERT = 1; [lzH%0 V
public final static int BUBBLE = 2; AR g]GV/L
public final static int SELECTION = 3; |Vp ?
public final static int SHELL = 4; `*]r+J2
public final static int QUICK = 5; V-"#Kf9
public final static int IMPROVED_QUICK = 6; !.O;SG
public final static int MERGE = 7; %PPkT]~\
public final static int IMPROVED_MERGE = 8; 2Ic)]6z R
public final static int HEAP = 9; s,M]f,T
8/~@3-9EK
public static void sort(int[] data) { ?}C8_I|4~
sort(data, IMPROVED_QUICK); GxE`z6%[
} GZmfE`
private static String[] name={ +hs:W'`%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +KIBbXF7
}; _9S"rH[
-@~4:o
private static Sort[] impl=new Sort[]{ *]DO3Zw'
new InsertSort(), Ctk1\quz
new BubbleSort(), I~-sBMm(w
new SelectionSort(), .{(gku>g(
new ShellSort(), :1~4X
new QuickSort(), kAW2vh
new ImprovedQuickSort(), -)DxF<8B
new MergeSort(), 4OG1_6K
new ImprovedMergeSort(), i\* b<V
new HeapSort() %V(U]sbV
}; 8C I\NR{x8
W>[TFdH?
public static String toString(int algorithm){ s2#}@b6'.
return name[algorithm-1]; <co:z<^lqu
} *QoQ$alHH
~Yre(8+M
public static void sort(int[] data, int algorithm) { \3x+Z!
impl[algorithm-1].sort(data); cxIAI=JK
} z\K-KD{Ad
K)eyFc
public static interface Sort { .AF\[IQ
public void sort(int[] data); k~JTQh*,w
} .8wF> 8
S=$ \S9
public static void swap(int[] data, int i, int j) { QO4eDSW
int temp = data; NkAu<> G _
data = data[j]; LfvRH?<W
data[j] = temp; `U>]*D68
} -8SZ}J
} l?HC-_Pbh