[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; &~=FXe0S
} _cvA1Q"
int i1=l; O]_a$U*6
int i2=mid+1; #1fL2nlP*E
for(int cur=l;cur<=r;cur++){ N_wj,yF*
if(i1==mid+1) 8=!uQQ
data[cur]=temp[i2++]; x994B@\j+
else if(i2>r) .>#X*u
data[cur]=temp[i1++]; $Mg[e*ct
else if(temp[i1] data[cur]=temp[i1++]; E<RPMd @a
else fofYe0z
data[cur]=temp[i2++]; ,="hI:*<
} {ooztC
} GHNw.<`l?
2$r8^}Nj?
} G+7#!y Y
^?J3nf{
改进后的归并排序: HTz5LAe~b7
,>+B>lbJ*
package org.rut.util.algorithm.support; *'w?j)}A9g
Zzn N"Si,
import org.rut.util.algorithm.SortUtil; wxJu=#!M
=E.!Ff4~(
/** OEw#;l4 C
* @author treeroot {ty)2
* @since 2006-2-2 .jUM'; l
* @version 1.0 rjK]zD9
*/ )E|{.K
public class ImprovedMergeSort implements SortUtil.Sort { H2lQ(Y+H
; DXsPpZC
private static final int THRESHOLD = 10; j+9;Rvt2
5'\detV_
/* @eJ6UML"
* (non-Javadoc) w**~k]In
* 3D;?X@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t)|~8xpP
*/ <@Z`<T6
public void sort(int[] data) { R1$s1@3I|
int[] temp=new int[data.length]; E$.fAIt
mergeSort(data,temp,0,data.length-1); .8wf {y
} (^oN, 7
9;7Gzr6A"
private void mergeSort(int[] data, int[] temp, int l, int r) { 5G2G<[p5oQ
int i, j, k; av&~A+b.r
int mid = (l + r) / 2; H-rxn
if (l == r) =(+]ee!Ti
return; +=:_a$98
if ((mid - l) >= THRESHOLD) H +'6*akV
mergeSort(data, temp, l, mid); w_h{6Kc<
else 1etT."
insertSort(data, l, mid - l + 1); AL!ppi
if ((r - mid) > THRESHOLD) QLH!>9Ch
mergeSort(data, temp, mid + 1, r); +T\<oj%}2
else !(Ymc_s
insertSort(data, mid + 1, r - mid); q68CU~i*
L{&>,ww
for (i = l; i <= mid; i++) { s"@}^ )*}
temp = data; $DXO7;#
} fMIRr5
for (j = 1; j <= r - mid; j++) { zo1T`"Y
temp[r - j + 1] = data[j + mid]; f&j\gYWq
} r+8)<Xt+p
int a = temp[l]; LC4VlfU
int b = temp[r]; {#st>%i
for (i = l, j = r, k = l; k <= r; k++) { mPU}]1*p
if (a < b) { qfG:vTm
data[k] = temp[i++]; ~s-bA#0S
a = temp; p>,D F9W`
} else { zMRa<G7
data[k] = temp[j--]; tm/=Oc1p
b = temp[j]; :tBe/(e4#
} Fv7]1EO.
} ~j>yQ%[v
} fF(AvMsO
:pM)I5MN[
/** &#JYh=#
* @param data tA^+RO4
* @param l pV(k6h
* @param i #1%ahPhR+
*/ je@&|9h
private void insertSort(int[] data, int start, int len) { ]isq}Qv~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W/\pqH
} tmOy"mq67
} HU'w[r6a
} :8(jhs
} KTt+}-vP^
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堆排序： c&1_lI,tH
e,{k!BXU#'
package org.rut.util.algorithm.support; CcW3o"=4
|||m5(`S
import org.rut.util.algorithm.SortUtil; SOE-Kio=B
F53 .g/[
/** %f'=9pit
* @author treeroot ^SsdM#E
* @since 2006-2-2 q6N{N>-D
* @version 1.0 .71ZeLv*
*/ |JR`" nF`
public class HeapSort implements SortUtil.Sort{ ]zVQL_%,
x&^Xgi?
/* (non-Javadoc) nBd]rak'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f[D%(
*/ L-)ZjXzk
public void sort(int[] data) { xOPQ~J|z
MaxHeap h=new MaxHeap(); jygUf|
h.init(data); M"W#_wY;
for(int i=0;i h.remove(); n-SO201[*
System.arraycopy(h.queue,1,data,0,data.length); `q\F C[W
} P=1Ku|k
u$[&'D6
private static class MaxHeap{ n|?sNM<J3
|=v,^uo
void init(int[] data){ "9dZ z/{
this.queue=new int[data.length+1]; % >a /m.$
for(int i=0;i queue[++size]=data; *1!'ZfT;
fixUp(size); $[b}r#P
} U\,N
} n^$Q^[:Z
)7!,_r
private int size=0; Tc!n@!RA|
6W
private int[] queue; Nt_sV7zzb
A$7K5
public int get() { F'>yBDm*OM
return queue[1]; uH?4d!G
} 5#x[rr{^*
|A,.mOT
public void remove() { Z ztp %2c
SortUtil.swap(queue,1,size--); IY6Qd4157
fixDown(1); sr[[xzL
} 8+7*> FD)1
file://fixdown 8%?MRRK
private void fixDown(int k) { Ac{TqiIv
int j; ~N}Zr$D
while ((j = k << 1) <= size) { Drf Au
if (j < size %26amp;%26amp; queue[j] j++; Y@q9
if (queue[k]>queue[j]) file://不用交换 Z_dL@\#|
break; %"oGJp
SortUtil.swap(queue,j,k); >'=9sCi
k = j; As5l36
} ltU{P|7!E
} 6Y6t.j0vN.
private void fixUp(int k) { K$GQc"
while (k > 1) { >ySO.S
int j = k >> 1; 9bRUN<
if (queue[j]>queue[k]) v9,cL.0&
break; 9ghUiBPiL:
SortUtil.swap(queue,j,k); nO'C2)bBSG
k = j; 3?`TEw~'
} pbqk
} 4JXvP1`
lTN^c?
} ki2`gLK
J4j:nd
} {*g{9`
vA ZkT"
SortUtil： fuCt9Kjo<
(nBh6u*
package org.rut.util.algorithm; sK9RViqF\
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import org.rut.util.algorithm.support.BubbleSort; P*}aeu&lnD
import org.rut.util.algorithm.support.HeapSort; kef%5B
import org.rut.util.algorithm.support.ImprovedMergeSort; xe(7q1
import org.rut.util.algorithm.support.ImprovedQuickSort; t5i58@{~
import org.rut.util.algorithm.support.InsertSort; Y}q~Km
import org.rut.util.algorithm.support.MergeSort; ,CPAS}kS
import org.rut.util.algorithm.support.QuickSort; wL]#]DiE
import org.rut.util.algorithm.support.SelectionSort; .X)Wb{7
import org.rut.util.algorithm.support.ShellSort; huyfo1(
lfd-!(tXD
/** 20haA0s
* @author treeroot vF~q".imC
* @since 2006-2-2 P|lDW|}D@
* @version 1.0 #j+cl'
*/ lx2%=5+i;
public class SortUtil { 1=9GV+`n
public final static int INSERT = 1; Z!fbc#L6
public final static int BUBBLE = 2; kz("LI]
public final static int SELECTION = 3; o@[o6.B<
public final static int SHELL = 4; zLg$|@E&
public final static int QUICK = 5; v_v>gPl,
public final static int IMPROVED_QUICK = 6; nra)t|m
public final static int MERGE = 7; ci:|x =
public final static int IMPROVED_MERGE = 8; (]&B'1b
public final static int HEAP = 9; T$<'ZC
:P%?!'M
public static void sort(int[] data) { ;.=0""-IF
sort(data, IMPROVED_QUICK); p0l.f`B
} 6CGk*s
private static String[] name={ 8I#^qr5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7zU~X,
}; ''!j:49
Lc]hwMGR*
private static Sort[] impl=new Sort[]{ iyUnxqP
new InsertSort(), R3piI&u
new BubbleSort(), *u,xBC2C
new SelectionSort(), 1;{nU.If
new ShellSort(), T/%Y_.NtU
new QuickSort(), 28+{
new ImprovedQuickSort(), tux`-F
new MergeSort(), 'IVC!uL,%
new ImprovedMergeSort(), x{So
new HeapSort() K$:btWSm
}; a0B%x!y^
Rp:I&f$Hk/
public static String toString(int algorithm){ 9U3}_
return name[algorithm-1]; UMFM.GI
} 87)/dHc
Ro<5c_k
public static void sort(int[] data, int algorithm) { R6z *!W{
impl[algorithm-1].sort(data); gA1j'!\6l9
} 3G^A^]h
zJUT<%[U
public static interface Sort { %X%f0J
public void sort(int[] data); o~4kJW#
} TC=>De2;
.>_%12>
public static void swap(int[] data, int i, int j) { #\_FSr fX
int temp = data; =dQF}-{!
data = data[j]; '%TD#!a
data[j] = temp; Y[rCF=ZVH
} U!BZsVx
} .]<gm9l