[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; q.bxnta"
} ^#!\VGnL
int i1=l; y&(pt!I
int i2=mid+1; .Vrl:
for(int cur=l;cur<=r;cur++){ OCELG~
if(i1==mid+1) >BZ,g!N,J}
data[cur]=temp[i2++]; @~bP|a
else if(i2>r) LT#EYnG
data[cur]=temp[i1++]; }=d}q *
else if(temp[i1] data[cur]=temp[i1++]; cHC4Y&&uZ
else mLfY^&2Pr
data[cur]=temp[i2++]; Gdz*
} p$}/~5b}4
} X<Ag['r
l:~/%=
} jAdZS\?w
9t!Agxm
改进后的归并排序: 7/K L<T9@
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package org.rut.util.algorithm.support; LKBh{X0%(
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import org.rut.util.algorithm.SortUtil; k8b5~A,
0ev='v8?
/** <;*w97n
* @author treeroot u6Yp,!+
* @since 2006-2-2 ft1V1 c
* @version 1.0 aVZ/e^kk-
*/ S3s6
public class ImprovedMergeSort implements SortUtil.Sort { X>%li$9J.
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private static final int THRESHOLD = 10; *i {e$Zv'
e>x+Xj1
/* 3oV2Ek<d
* (non-Javadoc) 3+&k{UZjt
* t +|t/1s2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &F8*>F^7
*/ @F/,~|{iM
public void sort(int[] data) { 2({|LQqk
int[] temp=new int[data.length]; ECk3Da
mergeSort(data,temp,0,data.length-1); ]xGpN ]u
} niyI$OC
1DlXsup&?#
private void mergeSort(int[] data, int[] temp, int l, int r) { vX_;Y#uD
int i, j, k; ?R_fg
int mid = (l + r) / 2; A b+qLh&?
if (l == r) S`Z[MNY
return; NA$%Up
if ((mid - l) >= THRESHOLD) ipE|)Ns
mergeSort(data, temp, l, mid); I|wC`VgB
else M+I9k;N6&
insertSort(data, l, mid - l + 1); OC)=KV@KE
if ((r - mid) > THRESHOLD) sR^b_/ElxT
mergeSort(data, temp, mid + 1, r); CjEzsjqe<I
else ' g d=\gV
insertSort(data, mid + 1, r - mid); UOyM=#ipY
UW1i%u k
for (i = l; i <= mid; i++) { jX0^1d@
temp = data; y t7>,
} {9* l
for (j = 1; j <= r - mid; j++) { T-h[$fxR_
temp[r - j + 1] = data[j + mid]; +F.@n_}p-I
} SLNq%7apx
int a = temp[l]; YP[8d,
int b = temp[r]; UXh%DOq
for (i = l, j = r, k = l; k <= r; k++) { B6@q`Bmw.
if (a < b) { VK!HuO9l
data[k] = temp[i++]; $)~:H-
a = temp; ,& wd
} else { ]^8CtgC
data[k] = temp[j--]; {-Gh 62hDg
b = temp[j]; &DjA?0`J
} bk&kZI.D
} #=)!\
} lI~8[[$xd
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/** K{,'%|
* @param data Vl3-cW@p
* @param l z]KJ4
* @param i X"9N<)C
*/ ~dzD7lG6
private void insertSort(int[] data, int start, int len) { ]~~G<Yh:=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g W_E
} t/_\w"
} =[zP
} ^nK7&]rK
} DWEDL[{
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堆排序： (BngwLVDK
N|%r5%
package org.rut.util.algorithm.support; =k,?+h~
X,Rl&K\b"
import org.rut.util.algorithm.SortUtil; #;5Qd'
dkY JO!
/** j5og}Pq:
* @author treeroot JH u>\{8V
* @since 2006-2-2 bxzx@sF2l
* @version 1.0 n 83Dt*O
*/ %YbL%i|U
public class HeapSort implements SortUtil.Sort{ m#R"~ >
Qv g_|~n
/* (non-Javadoc) |ICn/r~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >&ZlCE
*/ `7'^y
public void sort(int[] data) { 2h#.:!/SMw
MaxHeap h=new MaxHeap(); )\PX1198
h.init(data); IuA4eDr^Y%
for(int i=0;i h.remove(); OnhR`
System.arraycopy(h.queue,1,data,0,data.length); ]*gf$D
} 3ZI:EZ5
cNN0-<#c
private static class MaxHeap{ fUfd5W1"
aOd|;Z
void init(int[] data){ KFRf5^%
this.queue=new int[data.length+1]; `(gQw~|z
for(int i=0;i queue[++size]=data; cK2;)&U7
fixUp(size); }p-/R'
} :>Bk^"
} bBV03_*
.z=%3p8+
private int size=0; uc}tTmB|
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private int[] queue; Om;aE1sW
Rkp +}@Y_
public int get() { Bo14t*(
return queue[1]; q`.=/O'
} kM[!UOnC!<
$06('Hg&
public void remove() { ^FQn\,
SortUtil.swap(queue,1,size--); dG8mE&$g
fixDown(1); c5uC?b].
} O*bzp-6\
file://fixdown 5`$!s17
private void fixDown(int k) { XA(.O|VZ
int j; (:o:_U
while ((j = k << 1) <= size) { PIXqd,
if (j < size %26amp;%26amp; queue[j] j++; "FhC"}N
if (queue[k]>queue[j]) file://不用交换 k}I65 ^l#
break; H+-x.l`
SortUtil.swap(queue,j,k); GN Ewq$
k = j; ~7PiIky.
} }Y|M+0
} <RpTk*Yo^=
private void fixUp(int k) { MX?UmQ'
while (k > 1) { AAW] Y#UwW
int j = k >> 1; s;E(51V<>
if (queue[j]>queue[k]) W}"tf L8
break; y\(xYB>T
SortUtil.swap(queue,j,k); @GGQ13Cj(
k = j; n%G[Y^^,
} G@Sqg
} Z!Z{Gm3
a(*"r:/lD
} MxUbx+_N
?.uhp
} k@s<*C
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SortUtil： 08{^Ksg
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package org.rut.util.algorithm; r}sO},i
c0HPS9N\
import org.rut.util.algorithm.support.BubbleSort; tCoE4Ed
import org.rut.util.algorithm.support.HeapSort; p&u\gSo
import org.rut.util.algorithm.support.ImprovedMergeSort; =cb!2%?}
import org.rut.util.algorithm.support.ImprovedQuickSort; Y2'HP)tfIw
import org.rut.util.algorithm.support.InsertSort; rBU)@IpDG
import org.rut.util.algorithm.support.MergeSort; .qKfhHJ
import org.rut.util.algorithm.support.QuickSort; @o*~\E<T
import org.rut.util.algorithm.support.SelectionSort; M(:bM1AD`u
import org.rut.util.algorithm.support.ShellSort; 9Iq<*\V 4
+'iqGg-
/** $aB`A$'hK
* @author treeroot \kf n,m
* @since 2006-2-2 FV7'3fIa
* @version 1.0 -!mtLaLw
*/ Gc*=n*@^K
public class SortUtil { zY@0R`{@p
public final static int INSERT = 1; nk_X_y
public final static int BUBBLE = 2; GA` bWl
public final static int SELECTION = 3; r..f$FF)\
public final static int SHELL = 4; =qoOr~
public final static int QUICK = 5; zHg=K /
public final static int IMPROVED_QUICK = 6; 7HY8 F5Brx
public final static int MERGE = 7; tS5J{j>T
public final static int IMPROVED_MERGE = 8; #G?#ot2o
public final static int HEAP = 9; f*88k='\W
y29G#Y4J
public static void sort(int[] data) { @8w5Oudvx
sort(data, IMPROVED_QUICK); BzH0"xq^
} _TmKn!Jw
private static String[] name={ 0_-o]BY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Rq e|7/As
}; @%*@Rar
n%RaEL
private static Sort[] impl=new Sort[]{ >?)_, KL
new InsertSort(), YU`k^a7%
new BubbleSort(), "VHT5k
new SelectionSort(), ~`^kP.()
new ShellSort(), BB9eQ: xO
new QuickSort(), {oF;ZM'r
new ImprovedQuickSort(), Vr"'O6
new MergeSort(), ^+-]V9?+
new ImprovedMergeSort(), [{#TN
new HeapSort() _ W#Km
}; &iq'V*+-\
WA1yA*S
public static String toString(int algorithm){ \ZhkOl
return name[algorithm-1]; 0S4Y3bac&
} n[qnrk*3 %
@jjxgd'%&
public static void sort(int[] data, int algorithm) { 92R,o'#
impl[algorithm-1].sort(data); F7w\ctUP
} OC-d5P
wu11)HFL|z
public static interface Sort { uOKD#
public void sort(int[] data); bG*l_
} ^&y*=6C
bivo7_
public static void swap(int[] data, int i, int j) { &'i>d&
int temp = data; \fSruhD
data = data[j]; 8tf>G(I{
data[j] = temp; {R[V
} RhT:]
} =h=-&DSA