[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; h:(Jes2
} -gh',)R
int i1=l; l!\C"f1o,
int i2=mid+1; %*<k5#Yq
for(int cur=l;cur<=r;cur++){ g/so3F%v .
if(i1==mid+1) j3VM!/
data[cur]=temp[i2++]; R:B-4
else if(i2>r) $nQ; ++
data[cur]=temp[i1++]; a J[VX)"J
else if(temp[i1] data[cur]=temp[i1++]; n<Z;Xh~F
else :Tw3Oo_~S
data[cur]=temp[i2++]; gh}FZs5P
} N{`-&8q;K
} gLQWL}0O
x;LyR
} :7IL|bA<
bslv_OxJ
改进后的归并排序: UuAn`oYhV
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package org.rut.util.algorithm.support; 5Ga>qIM
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import org.rut.util.algorithm.SortUtil; 3mZX@h@
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/** %,MCnu&Z
* @author treeroot 4pkc9\
* @since 2006-2-2 F&;g< SD
* @version 1.0 dW<.
*/ Q<zL;AJ
public class ImprovedMergeSort implements SortUtil.Sort { $}l0Nh'Eu
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private static final int THRESHOLD = 10; ;=hl!CB
b]~X U
/* wCeSs=[
* (non-Javadoc) >DQl&:-)t
* 2Y&z}4'j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KU3lAjzN
*/ Jd&Qi)1
public void sort(int[] data) { P /wc9Yt
int[] temp=new int[data.length]; a<sEdp
mergeSort(data,temp,0,data.length-1); sU4(ed\gI\
} :q;vZ6Xd
b`E0tZcJ
private void mergeSort(int[] data, int[] temp, int l, int r) { gPe*M =iF
int i, j, k; 0gHJ%m9s
int mid = (l + r) / 2; w@.E}%bwq
if (l == r) A2Rr*e
return; b0x9}
if ((mid - l) >= THRESHOLD) 5bv(J T
mergeSort(data, temp, l, mid); ;7 i0ko9
else > zh%CF$
insertSort(data, l, mid - l + 1); v@`#!iu
if ((r - mid) > THRESHOLD) 6,uW{l8L
mergeSort(data, temp, mid + 1, r); CBs0>M/
else }k duN0
insertSort(data, mid + 1, r - mid); C>N)~Ut
1]fqt[*)
for (i = l; i <= mid; i++) { DkA cT[
temp = data; Q0,]Q ]_
} -a]oN:ERb
for (j = 1; j <= r - mid; j++) { O\XN/R3
temp[r - j + 1] = data[j + mid]; ,y,NVF
} i+Px &9o<9
int a = temp[l]; ]0xbvJ8oK
int b = temp[r]; [xk1}D
for (i = l, j = r, k = l; k <= r; k++) { Ws4aCH1
if (a < b) { W )q^@6[d
data[k] = temp[i++]; U{h5uezD
a = temp; tn6\0_5n
} else { "2 ma]Ps
data[k] = temp[j--]; 8~EDmg[
b = temp[j]; 7&:gvhw
} JE9|;A
} el.;T*Wn
} B~lrd#qC
_,NL;66=[
/** W*u Yb|0
* @param data 9X@y*;w<t
* @param l K`j#'`/KC
* @param i jbn{5af
*/ Ngu+V
private void insertSort(int[] data, int start, int len) { _I&0HRi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); eq"a)QB3m
} a>.2Q<1
} &y mfA{s
} ,/m<=`*N|
} hqFK2 lR
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堆排序： '+Gt+Gq+
Y@TZReb
package org.rut.util.algorithm.support; $oH?oD1
b3H~a2"d
import org.rut.util.algorithm.SortUtil; _|wgw^.LJ]
37a"<
/** I^[R]Js
* @author treeroot /o.wCy,J<
* @since 2006-2-2 E[Tz%x=P
* @version 1.0 HpSgGhL'J&
*/ ]b.@i&M
public class HeapSort implements SortUtil.Sort{ #|GP]`YT
z~A||@4'
/* (non-Javadoc) <!Nj2>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,@khV
*/ E3_e~yu&
public void sort(int[] data) { 2l{g$44
MaxHeap h=new MaxHeap(); "T<Q#^m
h.init(data); |5Mhrb4.
for(int i=0;i h.remove(); C=h$8Q
System.arraycopy(h.queue,1,data,0,data.length); Dsm_T1X
} )j4]Y dJ
%8yfFrk
private static class MaxHeap{ ?Re@`f+*
vZTX3c:,1
void init(int[] data){ s)_7*DY
this.queue=new int[data.length+1]; ]V<[W,*(5
for(int i=0;i queue[++size]=data; :7e2O!zH_
fixUp(size); ;B^G<
} 7cK#fh"hvg
} ]N:SB
/$! /F@^
private int size=0; 6sRn_y
tt{,f1v0t
private int[] queue; .2C}8GGC'
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public int get() { >E#| H6gx
return queue[1]; y)"aQJ>
} Qa5<go{
9 @!Og(l
public void remove() { LU?X|{z
SortUtil.swap(queue,1,size--); 3:PBVt=
fixDown(1); iJZqAfG{m?
} ;jfjRcU
file://fixdown 0X~
private void fixDown(int k) { TixHEhw
int j; gkI(B2,/
while ((j = k << 1) <= size) { mSY;hJi
if (j < size %26amp;%26amp; queue[j] j++; Ss@\'K3e
if (queue[k]>queue[j]) file://不用交换 PQa{5"
break; KX"?3#U#Fm
SortUtil.swap(queue,j,k); t*.O >$[
k = j; .YYiUA-i9n
} PM=Q\0
} ,LSF@1|Fx
private void fixUp(int k) { Agl5[{]E
while (k > 1) { (WVN*OR?
int j = k >> 1; " nq4!
if (queue[j]>queue[k]) m[LIM}Gu
break; !<h*\%;
SortUtil.swap(queue,j,k); (Vf&,b@U_
k = j; ^e"BY(
} IU{~{(p"
} Tt`|26/
x4CrWm
} J*-m!0 5
k v,'9z
} e-ljwCD
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SortUtil： N0O8to}V
glH&v8
package org.rut.util.algorithm; \tye:!a?;@
Pg{Dy>&2`I
import org.rut.util.algorithm.support.BubbleSort; MSUkCWt!
import org.rut.util.algorithm.support.HeapSort; Op" \i
import org.rut.util.algorithm.support.ImprovedMergeSort; 54_CewL1P]
import org.rut.util.algorithm.support.ImprovedQuickSort; =W.b7 6_
import org.rut.util.algorithm.support.InsertSort; fZ`b~ZBwIj
import org.rut.util.algorithm.support.MergeSort; JX7_/P
import org.rut.util.algorithm.support.QuickSort; |qH-^b.F
import org.rut.util.algorithm.support.SelectionSort; Sqed*
import org.rut.util.algorithm.support.ShellSort; Lp5LRw
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/** [<}:b>a
* @author treeroot x>A(016:C
* @since 2006-2-2 /1zi(z
* @version 1.0 \L}Soe'
*/ f>s3Q\+
public class SortUtil { !e?=I
public final static int INSERT = 1; t.t$6+"5We
public final static int BUBBLE = 2; |g;hXr#~
public final static int SELECTION = 3; ?SK1*; i
public final static int SHELL = 4; !>TVDN>
public final static int QUICK = 5; 4`o_r%
public final static int IMPROVED_QUICK = 6; 3!_y@sWx
public final static int MERGE = 7; elG<\[
public final static int IMPROVED_MERGE = 8; U; JZN
public final static int HEAP = 9; \U(qv(T
F-R4S^eV
public static void sort(int[] data) { ZN~:^,PO/
sort(data, IMPROVED_QUICK); "^fcXV9Wp
} H{VVxj
private static String[] name={ %E}f7GT4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e[$=5U~c
}; 8)s}>:}
Rb Jl;
private static Sort[] impl=new Sort[]{ oS 7q#`
new InsertSort(), 0j %s H
new BubbleSort(), -|\V'
new SelectionSort(), ;+'x_'a
new ShellSort(), a[Ah
new QuickSort(), vR.=o*!%
new ImprovedQuickSort(), fW~r%u .y
new MergeSort(), 4:.yE|@h[
new ImprovedMergeSort(), kO{A]LnAH
new HeapSort() X=USQj\A
}; \HF|&@}hU
w!,~#hbt6
public static String toString(int algorithm){ y2;uG2IS_g
return name[algorithm-1]; yDg`9q.ckm
} eU&[^
]dHU
public static void sort(int[] data, int algorithm) { .t*MGUg
impl[algorithm-1].sort(data); FloCR=^H
} z$ZG`v>0
}enm#0Ha
public static interface Sort { PN:/lIO
public void sort(int[] data); H:Y?("k
} @W[`^jfQ
f]W$4f{
public static void swap(int[] data, int i, int j) { %ZF47P%6
int temp = data; [v( \y
data = data[j]; Q'/v-bd?o
data[j] = temp; /FJ )gQYA
} Aj((tMJNOw
} {&nL'R