[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; ?wd|G4.Vo
} I?a8h`WS+
int i1=l; ,AH0*L
int i2=mid+1; 4K9Rpm
for(int cur=l;cur<=r;cur++){ 'aD6>8/Hj
if(i1==mid+1) nW4Vct
data[cur]=temp[i2++]; z,{e]MB)M
else if(i2>r) N5nvL)a~
data[cur]=temp[i1++]; 8RdP:*HY
else if(temp[i1] data[cur]=temp[i1++]; y(bsCsV&
else yjEI/9_
data[cur]=temp[i2++]; $ph0ag+
} [kbC'Eh*
} -IBO5;2_
x*.Ye5Jb
} Yd'H+r5b
ajn-KG!A
改进后的归并排序: }A{_L6qx
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package org.rut.util.algorithm.support; ~~PgF"v
R? O-x9
import org.rut.util.algorithm.SortUtil; 8HMo.*Ti9
3p=vz'
/** rdO@X9z
* @author treeroot *FV0Vy
* @since 2006-2-2 )ll?-FZ
* @version 1.0 T yU&QXb
*/ BlXX:aZv
public class ImprovedMergeSort implements SortUtil.Sort { /7bw: h;
NQ?x8h3
private static final int THRESHOLD = 10; n0_B(997*
: *ERRSL)
/* D"L|"qJ
* (non-Javadoc) R0%?:! F
* $`|5/,M%QN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -#Np7/
*/ ~}BJ0P(VMc
public void sort(int[] data) { _=ugxL #eB
int[] temp=new int[data.length]; lDo(@nM
mergeSort(data,temp,0,data.length-1); (nLKQV 1
} tG/aH%4S
U\Ct/U&A?
private void mergeSort(int[] data, int[] temp, int l, int r) { Hk,lX r
int i, j, k; j"5Pe
int mid = (l + r) / 2; xw?CMA
if (l == r) J"-_{)0lD
return; R1}IeeZO?&
if ((mid - l) >= THRESHOLD) sltk@
mergeSort(data, temp, l, mid); b\?3--q
else OR]T`meO
insertSort(data, l, mid - l + 1); `h?LVD'l
if ((r - mid) > THRESHOLD) o,CBA;{P
mergeSort(data, temp, mid + 1, r); :/B:FY=
else {VR`;
insertSort(data, mid + 1, r - mid); ( :{"C6x
NS@{~;#R
for (i = l; i <= mid; i++) { sGSsUO:@j;
temp = data; ,'~#Ch
} 8Jr1_a
for (j = 1; j <= r - mid; j++) { ?0{yq>fTu
temp[r - j + 1] = data[j + mid]; i^WIr h3a
} lzEb5mg
int a = temp[l]; >9=:sSQu
int b = temp[r]; Qm< gb+
for (i = l, j = r, k = l; k <= r; k++) { +@0TMK,P
if (a < b) { yO=p3PV d
data[k] = temp[i++]; <;%0T xK|U
a = temp; E/ijvuO
} else { \<ZLoy_
data[k] = temp[j--]; y0<Uu
b = temp[j]; I:i<>kG
} tRteyNA
} NvQ%J+
} bp#fyG"
w:}C8WKw
/** oU8>Llt=$
* @param data e2c1pgs&+
* @param l ltoqtB\s
* @param i FPF6H puV
*/ MAnp{
private void insertSort(int[] data, int start, int len) { )Vg2Jix,]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qgx?"$ Z
} 7S<UFj
} nLj&Uf&
} t,h{+lYU
} pj!:[d
`XW*kxpm
堆排序： @uM EXP
\gItZ}+c4}
package org.rut.util.algorithm.support; ;#&fgj
g6%Z)5D]!
import org.rut.util.algorithm.SortUtil; K'aWCscM
b:kXNDc
/** rQJ"&CapT
* @author treeroot ~zF2`.
* @since 2006-2-2 jJBnDxsA
* @version 1.0 G 4qy*.
*/ (?3[3w~
public class HeapSort implements SortUtil.Sort{ ka/XK[/'
5wT>N46UX
/* (non-Javadoc) 26L~X[F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nWJ:=JQ i"
*/ C!&y
public void sort(int[] data) { ,%W<O.
MaxHeap h=new MaxHeap(); [A9JshMo
h.init(data); /(?@mnq_
for(int i=0;i h.remove(); 8;8c"'Mn
System.arraycopy(h.queue,1,data,0,data.length); P`jL]x
} s+Q;pRZW{
fP[& a9l
private static class MaxHeap{ h2w}wsb0l
C4\,z\Q
void init(int[] data){ 9o0!m Cq
this.queue=new int[data.length+1]; j U[ O
for(int i=0;i queue[++size]=data; a{'Z5ail
fixUp(size); @I-Lv5
} LA%bq_>f
} VK:8 Nk_y
AIRr{Y
private int size=0; FT89*C)oD
&|Np0R
private int[] queue; jb[!E^'&>
`/nM[
public int get() { Y<f_`h^r
return queue[1]; iqwkARG"
} Ai"-w"
'91".c,3?
public void remove() { F$MX,,4U
SortUtil.swap(queue,1,size--); F|+W.9
fixDown(1); xW_yLbE
} <rIz Z'D
file://fixdown LL*mgTQ
private void fixDown(int k) { bAwl:l\`
int j; Q_p[kKH
while ((j = k << 1) <= size) { ?_g1*@pA
if (j < size %26amp;%26amp; queue[j] j++; hhI)' $
if (queue[k]>queue[j]) file://不用交换 jrMe G.e=D
break; :+rUBYWx
SortUtil.swap(queue,j,k); O+~ 7l?o
k = j; 'ZP)cI:+X
} YB,t0%vTJw
} Sw[{JB;y,
private void fixUp(int k) { ,Hn^z<f
while (k > 1) { p'94SXO_
int j = k >> 1; RA O`i>@
if (queue[j]>queue[k]) &miexSNeF
break; {ZsdLF#
SortUtil.swap(queue,j,k); 0?0Jz
k = j; 'CR)`G_'[
} ve6w<3D@
} Wu1{[a|
?rYT4vi
} b)#Oc,
;GGK`V
} 'gso'&Uaj
uz30_aH
SortUtil： sEc;!L
%~xGkk"I
package org.rut.util.algorithm; gI]GUD-
qe$^q
import org.rut.util.algorithm.support.BubbleSort; ciQZHH2
import org.rut.util.algorithm.support.HeapSort; ^|MjJsn
import org.rut.util.algorithm.support.ImprovedMergeSort; Q{g;J`Z)p
import org.rut.util.algorithm.support.ImprovedQuickSort; Tr&M~Lgb)
import org.rut.util.algorithm.support.InsertSort; {aYY85j
import org.rut.util.algorithm.support.MergeSort; SHVWwoieT
import org.rut.util.algorithm.support.QuickSort; ;gg\;i}^
import org.rut.util.algorithm.support.SelectionSort; 13hE}g;.
import org.rut.util.algorithm.support.ShellSort; {eS|j=
MrRaU x6z
/** 1.<q3q
* @author treeroot _<c$)1
* @since 2006-2-2 E#wS_[
* @version 1.0 WjSc/3Qy
*/ I@#;nyAj"
public class SortUtil { Dnf*7)X
public final static int INSERT = 1; LOy0hN-$b
public final static int BUBBLE = 2; = u[#2!
public final static int SELECTION = 3; hr05L<?H
public final static int SHELL = 4; *f%>YxF
public final static int QUICK = 5; txgQ"MGA%
public final static int IMPROVED_QUICK = 6; aGZi9O7G}
public final static int MERGE = 7; 3r+.N
public final static int IMPROVED_MERGE = 8; "KX=ow#z|
public final static int HEAP = 9; IuF_M<d,
Nes=;%&]G
public static void sort(int[] data) { _PFnh)o
sort(data, IMPROVED_QUICK); 2i{cQ96
} Iq7}
private static String[] name={ vQ}6y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *Lqg=9kzr
}; \b=Pj!^gwb
$Xm6N@
private static Sort[] impl=new Sort[]{ q$(5Vd:
new InsertSort(), bg,9@ }"F
new BubbleSort(), 5{e,L>H<
new SelectionSort(), j^tW Iz
new ShellSort(), 39wa|:I
new QuickSort(), Vwk#qgnX
new ImprovedQuickSort(), L"jY+{oLIJ
new MergeSort(), 9^FziM
new ImprovedMergeSort(), Ian[LbCWB
new HeapSort() QqNW}:#
}; 0+Ta%H{
[u}(57DS
public static String toString(int algorithm){ m%;D
return name[algorithm-1]; DGW+>\G
} NA3\
osARA3\Xt
public static void sort(int[] data, int algorithm) { tZ`Ts}\e
impl[algorithm-1].sort(data); L(T12s
} <JMcIV837
bV8g|l-4(
public static interface Sort { 40E#JF#
public void sort(int[] data); jHN +5=l
} -HSs^dP`
g_5QA)4x
public static void swap(int[] data, int i, int j) { gz2\H}
int temp = data; fXI:Y8T
data = data[j]; DejA4XdW
data[j] = temp; oi}i\: hI
} ~qe%Yq
} 7dsefNPb