[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; <T+{)FV
} -&JQdrs
int i1=l; -SN6&-#c_
int i2=mid+1; _FtsO<p)"
for(int cur=l;cur<=r;cur++){ QI*<MF,1
if(i1==mid+1) ,WQg.neOA
data[cur]=temp[i2++]; s0*@zn>h
else if(i2>r) eq,`T;
data[cur]=temp[i1++]; M}x]\#MMY
else if(temp[i1] data[cur]=temp[i1++]; @"__2\ 0
else #8@o%%Fd
data[cur]=temp[i2++]; .T\_4C
} @23~)uiZa
} L=wpZ`@ y
XN}^:j_2
} P9jPdls
3V%ts7:a
改进后的归并排序: 12HE=
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package org.rut.util.algorithm.support; ]..7t|^b&
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import org.rut.util.algorithm.SortUtil; MZ"|Jn
Usq.'y/o
/** Q?/qQ}nNw
* @author treeroot ")@#B=8+3^
* @since 2006-2-2 jzd)jJ0M
* @version 1.0 M<'He.n
*/ 'T(@5%Db
public class ImprovedMergeSort implements SortUtil.Sort { |(3"_
tQ(4UHqa~
private static final int THRESHOLD = 10; v:?l C<,
oMHTB!A=2
/* 6QAhVg: A
* (non-Javadoc) {3!E8~
* t[o_!fmxZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '^%kTNn
*/ ,)ZI&BL5
public void sort(int[] data) { r1/9BTPKdJ
int[] temp=new int[data.length]; 2B"&WKk
mergeSort(data,temp,0,data.length-1); frT<9$QUL
} }No8to
vp(ow]Q
private void mergeSort(int[] data, int[] temp, int l, int r) { bW^C30m
int i, j, k; {BzE
int mid = (l + r) / 2; wEC,Mbn
if (l == r) b)@rp
return; IR|#]en
if ((mid - l) >= THRESHOLD) vKBijmE
mergeSort(data, temp, l, mid); I&;9
else .?kq\.rQ
insertSort(data, l, mid - l + 1); OJ r~iUr
if ((r - mid) > THRESHOLD) V6Y0#sTU
mergeSort(data, temp, mid + 1, r); CD[}|N
else (nAL;:$x2
insertSort(data, mid + 1, r - mid); <nc6&+
vwAtX($
for (i = l; i <= mid; i++) { Q)=LbR{#
temp = data; 8]Q#P
} *USG p<iH
for (j = 1; j <= r - mid; j++) { G_<4% HM
temp[r - j + 1] = data[j + mid]; ]94`7@
} `IT]ZAem`/
int a = temp[l]; -ARks_\
int b = temp[r]; i!)\m0Wm
for (i = l, j = r, k = l; k <= r; k++) { oI-,6G}
if (a < b) { ($-m}UF\/
data[k] = temp[i++]; 2P^x'I
a = temp; iFnD`l6)
} else { BhhFij4
data[k] = temp[j--]; &%m%b5
b = temp[j]; es<8"CcP
} :l&Yq!5
} SG]Sx4fg,Y
} k$ b)
\,pObWm
/** 'qJ0338d#U
* @param data \rd%$hci
* @param l Ub/ZzAwq
* @param i |-L7qZu%
*/ @qEUp7W.?
private void insertSort(int[] data, int start, int len) { rn/~W[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .3&(Y
} ")<5VtV
} i` Q&5KL
} ;8a9S0eS
} T^vhhfCUr
;GIA`=a%
堆排序： tAsap}(
N'i)s{'
package org.rut.util.algorithm.support; [iZH[7&j
Ph8@V}80"Y
import org.rut.util.algorithm.SortUtil; 2M=h:::W
:C2 @!W z
/** 1D_&n@
* @author treeroot -Nn<pq
* @since 2006-2-2 eph2&)D}Ep
* @version 1.0 G"w [>m
*/ [:uHe#L
public class HeapSort implements SortUtil.Sort{ "c\WZB`|
5?Pf#kq
/* (non-Javadoc) @)U;hk)j;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F?[1m2
*/ )FNn
public void sort(int[] data) { }x+6<Rp'E_
MaxHeap h=new MaxHeap(); IqiU
h.init(data); c0Pj})-
for(int i=0;i h.remove(); qsQ{`E0
System.arraycopy(h.queue,1,data,0,data.length); bi^Pk,'
} Vl;zd=
fvk(eWB
private static class MaxHeap{ 6%}`!_N<Mc
Up6OCF
void init(int[] data){ NfnPXsad
this.queue=new int[data.length+1]; @T:J<,
for(int i=0;i queue[++size]=data; i&?\Pp;5-j
fixUp(size); c g)>A
} 9p{n7.
} QO^V@"N
lX.-qCV"B
private int size=0; ,J,Rup">h
NGJst_
private int[] queue; (T%?@'\
eL~3CAV{
public int get() { )[oP`Z
return queue[1]; b.v +5=)B
} r8?p6E
1wFW&|>1
public void remove() { S~)`{ \
SortUtil.swap(queue,1,size--); 6VVxpDAi:
fixDown(1); YC')vv3o(
} 6aOyI;Ux
file://fixdown Y[]I!Bc
private void fixDown(int k) { :)i,K>y3i
int j; } C:i0Q
while ((j = k << 1) <= size) { `hdff0
if (j < size %26amp;%26amp; queue[j] j++; 1YQYZ^11
if (queue[k]>queue[j]) file://不用交换 AwjXY,2
break; ZuybjV1/f6
SortUtil.swap(queue,j,k); m#8(l{3|
k = j; kJpO0k9?eY
} TY'c'u,
} @6|<c
private void fixUp(int k) { Xdx8HB@L
while (k > 1) { Ar[|M2|
int j = k >> 1; *hru);OJr
if (queue[j]>queue[k]) g$^-WmX\m
break; ~TsRUT
SortUtil.swap(queue,j,k); /# ]eVD
k = j; URs]S~tk
} ox%j_P9@:
} /,\U*'-
QS!Z*vG
} yQMwt|C4
!+A%`m
} )obgEJ7Y`l
H`'a|Y
SortUtil： w7.,ch
1Acs0`3
package org.rut.util.algorithm; tsL ; wT_
l _%<U
import org.rut.util.algorithm.support.BubbleSort; 1O<6=oH
import org.rut.util.algorithm.support.HeapSort; g4b#U\D@)/
import org.rut.util.algorithm.support.ImprovedMergeSort; IdN3Ea]
import org.rut.util.algorithm.support.ImprovedQuickSort; / Ws>;0
import org.rut.util.algorithm.support.InsertSort; mvK^')
import org.rut.util.algorithm.support.MergeSort; y: x<`E=
import org.rut.util.algorithm.support.QuickSort; W#~7X
import org.rut.util.algorithm.support.SelectionSort; kl]MP}wc
import org.rut.util.algorithm.support.ShellSort; h x&"fe
|T@SlNi]
/** ,}&TZkN{-
* @author treeroot v@tEHRadz
* @since 2006-2-2 gT0yI;g]
* @version 1.0 NXFi*
*/ D\b$$z]q
public class SortUtil { 51b%uz
public final static int INSERT = 1; Y|><Ls6Q
public final static int BUBBLE = 2; hPSMPbI
public final static int SELECTION = 3; `_)H aF>/
public final static int SHELL = 4; ""jW'%wR
public final static int QUICK = 5; ^!\AT!OT
public final static int IMPROVED_QUICK = 6; JPAjOcmU/
public final static int MERGE = 7; g i6s+2
public final static int IMPROVED_MERGE = 8; fs 2MYat
public final static int HEAP = 9; l=p_
4NW!{Vw ,
public static void sort(int[] data) { 'E9{qPLk(
sort(data, IMPROVED_QUICK); h{iuk3G`h6
} P O 5Wi
private static String[] name={ a`n)aXU l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OcO/wA(&{
}; c0'ryS_Z9
D<d,9S,)
private static Sort[] impl=new Sort[]{ 8 5X}CCQ
new InsertSort(), lUB?eQuN_
new BubbleSort(), rAfz?
new SelectionSort(), u+r!;-0i
new ShellSort(), Ao8ua|:
new QuickSort(), Y4HN1
new ImprovedQuickSort(), #WSqh +
new MergeSort(), 8 E\zjT!#\
new ImprovedMergeSort(), PVp>L*|BZ;
new HeapSort() <+g77NL
}; _*6]4\;
^J#*sn
public static String toString(int algorithm){ pT->qQ3;
return name[algorithm-1]; =~hb&
} A~PR
)gdLb}
public static void sort(int[] data, int algorithm) { zUL,~u
impl[algorithm-1].sort(data); QF/_?Tm4
} zP%s]>hH
/HLI9
public static interface Sort { sFz0:SqhE
public void sort(int[] data); 3?a`@C&x
} wQUl!s7M;
&&9|;0<
public static void swap(int[] data, int i, int j) { NOQ^HEi
int temp = data; ;&O?4?@4
data = data[j]; vvv'!\'#
data[j] = temp; Pd~=:4
} m%`YAD@2z
} >-I <`y-H