[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; 1$Eiv8xd
} 'JkK0a2D
int i1=l; .`hlw'20
int i2=mid+1; c-M&cU+=L
for(int cur=l;cur<=r;cur++){ U(J?Q
if(i1==mid+1) y{v*iH<
data[cur]=temp[i2++]; =#y&xWxL
else if(i2>r) ]}'WNy6c&x
data[cur]=temp[i1++]; >\3=h8zw
else if(temp[i1] data[cur]=temp[i1++]; ep>S$a*|
else q_']i6
data[cur]=temp[i2++]; :v8j3=
} l+y/Mq^QB
} ;40!2P8t
doVBVTk^
} ZGe+w](
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改进后的归并排序: dX,2cK[aG
tDF6%RG
package org.rut.util.algorithm.support; Vb|DNl@
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import org.rut.util.algorithm.SortUtil; N:\I]M
0;} 9XZ
/** ID E3>D
* @author treeroot 1E=%:?d
* @since 2006-2-2 `lqMifD
* @version 1.0 fp|b@
*/ Z"] ben
public class ImprovedMergeSort implements SortUtil.Sort { =>n:\_*M
]?/[& PP,
private static final int THRESHOLD = 10; I[WW1P5
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/* wVP{R3
* (non-Javadoc) H&6lQ30/)
* :|EM1-lwf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n,bZj<3t
*/ '9H7I! L@
public void sort(int[] data) { w%GEOIj}
int[] temp=new int[data.length]; BO5F6lyQ0P
mergeSort(data,temp,0,data.length-1); #]q<fhJhr$
} 90Jxn'>^
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private void mergeSort(int[] data, int[] temp, int l, int r) { i:ZpAo+Z{
int i, j, k; 0jro0f'
int mid = (l + r) / 2; q{[}*%
if (l == r) Vdjf F&q
return; k?o(j/
if ((mid - l) >= THRESHOLD) TWK(vEDM
mergeSort(data, temp, l, mid); "9Sxj
else NJ9H=
insertSort(data, l, mid - l + 1); osB[KRT>("
if ((r - mid) > THRESHOLD) ~vy_~|6s
mergeSort(data, temp, mid + 1, r); CL5u{i5
else cfyN)#9
insertSort(data, mid + 1, r - mid); M;ac U~J
I $!Y
for (i = l; i <= mid; i++) { x>8=CiUE
temp = data; 9He>F7J:p'
} 8p }E
for (j = 1; j <= r - mid; j++) { i:0~%X
temp[r - j + 1] = data[j + mid]; bEfxu;Su3
} UxzZr%>s
int a = temp[l]; oIdMDp^$
int b = temp[r]; J GnL[9P_
for (i = l, j = r, k = l; k <= r; k++) { n a])bBn
if (a < b) { IKb 7#Ut
data[k] = temp[i++]; lwIU|T<4
a = temp; 6 :K~w<mMJ
} else { [~,~ e
data[k] = temp[j--]; y&")7y/uE
b = temp[j]; J 6U3}SO=y
} rLGh>bw#`3
} r4D*$H-rR
} hhLEU_U
qd6XKl\5
/** '9>z4G*Td
* @param data xV @X%E
* @param l {wiw]@c8
* @param i !U>711$
*/ tRZCOEo4
private void insertSort(int[] data, int start, int len) { EtK,C~C}8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W! v8'T
} H.qp~-n
} m7Nm!Z7
} yeqZPzn
} W6_/FkO
b/5
堆排序： QXqBb$AXi,
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package org.rut.util.algorithm.support; N>giFj[dD
nKC$ KC
import org.rut.util.algorithm.SortUtil; >_XRh
B v/]>Z
/** );$_|]#
* @author treeroot N'w;1,c+
* @since 2006-2-2 RR>Q$K
* @version 1.0 %?1k}(qUeY
*/ 02q]^3
public class HeapSort implements SortUtil.Sort{ fFudoIC
,d'x]&a
/* (non-Javadoc) 7Rqjf6kX`O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jXB<"bw
*/ H@GiHej
public void sort(int[] data) { Ufd{.o[{-
MaxHeap h=new MaxHeap(); 6|+I~zJ88
h.init(data); ;0(|06=
for(int i=0;i h.remove(); zL$$G,
System.arraycopy(h.queue,1,data,0,data.length); z)I.^
} T|`nw_0
avrf]raM|
private static class MaxHeap{ */fmy|#
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void init(int[] data){ `?{i dg
this.queue=new int[data.length+1]; _PZGns,u
for(int i=0;i queue[++size]=data; nm2bBX,fh
fixUp(size); ?a+>%uWt
} UM%]A'h2O"
} l?LwQmq6
oY{L0B[
private int size=0; {0 d/;
cl:h'aG
private int[] queue; .I_Mmaq;i
*P]FX-D3
public int get() { YYwFjA@
return queue[1]; Ugzq;}V#
} -\xNuU
PRcW}"m]Qg
public void remove() { %H Pwu &
SortUtil.swap(queue,1,size--); ~fbFA?g3
fixDown(1); ^u`1W^>
} *f{\ze@5=
file://fixdown 4/e|N#1`;[
private void fixDown(int k) { |Y?1rLC
int j; HfEU[p7)
while ((j = k << 1) <= size) { feSd%
if (j < size %26amp;%26amp; queue[j] j++; KvW{M
if (queue[k]>queue[j]) file://不用交换 X<{kf-GP
break; xwoK#eC~F
SortUtil.swap(queue,j,k); IGqg,OEAp
k = j; LldZ"%P
} 2>3#/I9Y
} +j Z,vKr
private void fixUp(int k) { 6V)P4ao
while (k > 1) { ~Ry?}5&:
int j = k >> 1; 30 e>C
if (queue[j]>queue[k]) I~ Q2jg2
break; ?T]3I.3 2^
SortUtil.swap(queue,j,k); ?Co)7}N
k = j; uL| Wuq
} o6L\39v_
} hq[;QF:B
}n/6.%
} W u?A} fH
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} EY'kIVk
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SortUtil： 2H+!78
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package org.rut.util.algorithm; p,#t[K
ypyqf55gK
import org.rut.util.algorithm.support.BubbleSort; N 0<([B;
import org.rut.util.algorithm.support.HeapSort; RN2^=$'.
import org.rut.util.algorithm.support.ImprovedMergeSort; Itaq4^CE
import org.rut.util.algorithm.support.ImprovedQuickSort; Y~vyCU5nWR
import org.rut.util.algorithm.support.InsertSort; W.u+R?a=
import org.rut.util.algorithm.support.MergeSort; jD]Ci#|W
import org.rut.util.algorithm.support.QuickSort; 3Wv-olv
import org.rut.util.algorithm.support.SelectionSort; (SMnYh4
import org.rut.util.algorithm.support.ShellSort; zM:&`6;e
&d}1)?
/** o%Ubn*
* @author treeroot "QCtF55X&
* @since 2006-2-2 E<6Fjy
* @version 1.0 i"0]L5=P
*/ !' ;1;k);
public class SortUtil { /Mq9~oC
public final static int INSERT = 1; }.`no
public final static int BUBBLE = 2; s}3g+T\l1w
public final static int SELECTION = 3; DAYR=s
public final static int SHELL = 4; Ss>ez8q
public final static int QUICK = 5; -lICoRO#
public final static int IMPROVED_QUICK = 6; Fl8*dXG&
public final static int MERGE = 7; Jkf%k3H3I*
public final static int IMPROVED_MERGE = 8; LdAWCBLS
public final static int HEAP = 9; :@x_& b
\_GG6
public static void sort(int[] data) { v/ $~ifY"
sort(data, IMPROVED_QUICK); ?xkw~3Yfi
} `4GEq2%
private static String[] name={ ^LAP*R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NJ%>|`FEi7
}; (tG8HwV-
~bC-0^/ 8|
private static Sort[] impl=new Sort[]{ LsW7JIQd
new InsertSort(), GhlbYa
new BubbleSort(), 0Ncx':]5
new SelectionSort(), |j2b=0Rpk
new ShellSort(), 'BUix!k0<
new QuickSort(), *yX5g,52-|
new ImprovedQuickSort(), VPC7Dh%.
new MergeSort(), 0Wd2Z-I
new ImprovedMergeSort(), C_5o&O8Bc
new HeapSort() Ufw_GYxan
}; Z|t`}lK
19#s:nt9
public static String toString(int algorithm){ 1:Sq?=&
return name[algorithm-1]; Dt#( fuk#
} *P:!lO\|
/w|!SZB
public static void sort(int[] data, int algorithm) { V= wWY*C
impl[algorithm-1].sort(data); [:Upn)9
} 0eMO`8u[A
0R21"]L_M
public static interface Sort { Ka4KsJN
public void sort(int[] data); .<fn+]
} r]+/"~a
5u5-:#sLy
public static void swap(int[] data, int i, int j) { =\ek;d0Tqb
int temp = data; }F B]LLi
data = data[j]; ;#)vw;XR
data[j] = temp; )G+D6s23
} dQ.:xu}~
} ;L`NF"