[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; M N-j$-y}
} Sq<ds}o'8l
int i1=l; ;og[q
int i2=mid+1; olA 1,8
for(int cur=l;cur<=r;cur++){ m2sf]-?Y
if(i1==mid+1) ^@91BY
data[cur]=temp[i2++]; o2'^MxKb T
else if(i2>r) {"rYlN7,
data[cur]=temp[i1++]; {&u`d.Lk2p
else if(temp[i1] data[cur]=temp[i1++]; IOL5p*:gz
else 79HKfG2+KB
data[cur]=temp[i2++]; ZMp5d4y5
} g>gVO@"b2
} py-5 :g}d
n1Ic[cM}
} #_(t46
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改进后的归并排序: 3lh^maQ]
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package org.rut.util.algorithm.support; ,a6Oi=+>/U
b=87k
import org.rut.util.algorithm.SortUtil; 9nGS"E l{
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/** Hl|EySno
* @author treeroot -F->l5
* @since 2006-2-2 cc0e(\
* @version 1.0 {tKi8O^Rb
*/ %[l#S*)~
public class ImprovedMergeSort implements SortUtil.Sort { :,8eM{.Q
a ]b%v9
private static final int THRESHOLD = 10; A#;TY:D2
KkK !E
/* Uo]x6j<
* (non-Javadoc) pw, <0UhV
* PI-o)U$Ehv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6}/m~m
*/ S\jIs[Dz
public void sort(int[] data) { 9coN >y
int[] temp=new int[data.length]; }57d3s
mergeSort(data,temp,0,data.length-1); +$CO
} #Y_v0.N
qA;!Pql`
private void mergeSort(int[] data, int[] temp, int l, int r) { zZE@:P&lf
int i, j, k; 8+|7*Ud
int mid = (l + r) / 2; <&CzM"\Em
if (l == r) c}u`L6!I3
return; ^2f2g>9j_C
if ((mid - l) >= THRESHOLD) )O:T\{7+
mergeSort(data, temp, l, mid); #cCR\$-~
else <jz\U7TBf
insertSort(data, l, mid - l + 1); Yn>y1~
if ((r - mid) > THRESHOLD) b0:5i<"w6
mergeSort(data, temp, mid + 1, r); {Gi:W/jJ
else E|9'{3$
insertSort(data, mid + 1, r - mid); w8KVs\/
nW"ml$
for (i = l; i <= mid; i++) { sry`EkS
temp = data; Om,M8!E
} 5^0K5R6GQf
for (j = 1; j <= r - mid; j++) { *.P3fVlZ
temp[r - j + 1] = data[j + mid]; (X|`|Y
} S(NUuu}S
int a = temp[l]; VT:m!<^
int b = temp[r]; b&g`AnYT
for (i = l, j = r, k = l; k <= r; k++) { kN8?.V%Utw
if (a < b) { 8]2j*e0xV
data[k] = temp[i++]; ^`f( Pg!
a = temp; wK*b2r}0/
} else { 0(h'ZV
data[k] = temp[j--]; ,\CG}-v@CN
b = temp[j]; ( L ]C
} )BX-Y@fpA
} uzO3_.4Y
} y&(R1Y75
m2r%m y
/** 41s[p56+@
* @param data :G/.h[\R|
* @param l Op 0Qpn
* @param i HLYo+;j3|
*/ Hphfqdh0`
private void insertSort(int[] data, int start, int len) { Ks/Uyu. X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *#&s+h,^
} wf&1,t3Bgn
} <1XJa2
} nep-?7x
} 2nv-/%]
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堆排序： Ynx.$$`$=
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package org.rut.util.algorithm.support; 5Vu@gRk_
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import org.rut.util.algorithm.SortUtil; 15U[F0b
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/** )u}MyFl.
* @author treeroot !vwx0
* @since 2006-2-2 j87IxB?o
* @version 1.0 1v"r8=Wt
*/ \*x=q20
public class HeapSort implements SortUtil.Sort{ =2tl149m/z
P%^\<#Ya7
/* (non-Javadoc) .=% ,DT"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (Gp|K6
*/ 63Dm{ 2i}F
public void sort(int[] data) { *=~X1s
MaxHeap h=new MaxHeap(); lBcRt)_O7
h.init(data); qcdENIy0b
for(int i=0;i h.remove(); ]>'yt #]
System.arraycopy(h.queue,1,data,0,data.length); 3!<} -sW4
} B_uAa5'
oHj64fE9
private static class MaxHeap{ u4,b%h.
@"$rR+r'
void init(int[] data){ Ymr\8CG/
this.queue=new int[data.length+1]; >x6$F*:W}
for(int i=0;i queue[++size]=data; VQ]MJjvb
fixUp(size); $ix*xm. 4m
} DUOSL
} $KGpcl
/c9%|<O%
private int size=0; 8QaF(?
J"W+9sI0
private int[] queue; J`@#yHL
q oJ4w7
public int get() { Ze>Pg.k+
return queue[1]; 'RjMwJy{
} M~ ^ {S[o
i<]Y0_?s
public void remove() { #&jr9RB
SortUtil.swap(queue,1,size--); 9'S~zG%{
fixDown(1); Uk0]A
} dtT2h>h9
file://fixdown DHO+JtO
private void fixDown(int k) { A_\ZY0Xt
int j; sJ(q.FRM'
while ((j = k << 1) <= size) { A[.5Bi
if (j < size %26amp;%26amp; queue[j] j++; A1u|L^
if (queue[k]>queue[j]) file://不用交换 <1EmQ)B
break; !s:v UY58
SortUtil.swap(queue,j,k); H%:u9DlEK/
k = j; <(<19t5.
} B%e#u.'6
} %M_5C4&6
private void fixUp(int k) { B,dHhwO*l
while (k > 1) { uY5Gn.Y
int j = k >> 1; S.kFs{;1x
if (queue[j]>queue[k]) dPfDPb
break; _-.~>C
SortUtil.swap(queue,j,k); !1M=9 ~$!
k = j; 7L=V{,,v
} ;"@FLq(n
} bk#t+tuk
}hjJt,m
} :/ yR
uVBMI.&w
} l8_TeO
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SortUtil： M+N7JpR
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package org.rut.util.algorithm; 2r]!$ hto
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import org.rut.util.algorithm.support.BubbleSort; dGb]`*E
import org.rut.util.algorithm.support.HeapSort; }ST0?_0F*
import org.rut.util.algorithm.support.ImprovedMergeSort; yv!,iK9
import org.rut.util.algorithm.support.ImprovedQuickSort; =>7\s}QZ
import org.rut.util.algorithm.support.InsertSort; "[LSDE"(
import org.rut.util.algorithm.support.MergeSort; VC6S4FU4K
import org.rut.util.algorithm.support.QuickSort; @$(/6]4p
import org.rut.util.algorithm.support.SelectionSort; +yYv"J
import org.rut.util.algorithm.support.ShellSort; 8'kA",P
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/** .7nr:P
* @author treeroot &$?i
* @since 2006-2-2 "w\Iz]
* @version 1.0 ]GS@ub
*/ .2jG~_W[
public class SortUtil { pSq3\#Twr
public final static int INSERT = 1; #^bkM)pc
public final static int BUBBLE = 2; $ZPiM
public final static int SELECTION = 3; 5^\f[}
public final static int SHELL = 4; U/JeEI%L
public final static int QUICK = 5; @zJhJ'~Sl
public final static int IMPROVED_QUICK = 6; AjQ^ {P
public final static int MERGE = 7; M zLx2?
public final static int IMPROVED_MERGE = 8; 7 vS]O$w<4
public final static int HEAP = 9; ?=]*r>a3
+c699j;[
public static void sort(int[] data) { | ZI~#V
sort(data, IMPROVED_QUICK); `aS9o]t
} g]g2`ab |
private static String[] name={ (zFUC]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V+()`>44
}; oj7X9~ nd
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private static Sort[] impl=new Sort[]{ <h/\)bPB
new InsertSort(), oK GFDl]3
new BubbleSort(), p,=:Ff}~
new SelectionSort(), U/B1/96lJ
new ShellSort(), $rySz7NI
new QuickSort(), ^;2dZgJ4^
new ImprovedQuickSort(), <N%8"o
new MergeSort(), \Mv8pU
new ImprovedMergeSort(), ;n*N9-|.
new HeapSort() O/IW.t
}; qO<'_7TN[
fNi&1J-/
public static String toString(int algorithm){ 0 mWfR8h0
return name[algorithm-1]; ] =jnt
} dm Lgt)-t
>8V;:(nt
public static void sort(int[] data, int algorithm) { .,K?(O4AY
impl[algorithm-1].sort(data); ,~Y5vnaOQ
} b&g9A{t
$ ;/Ny)"
public static interface Sort { G6zFCgFJ^y
public void sort(int[] data); gz[Ng> D+
} @NXGVmY1}
$J#}3;a
public static void swap(int[] data, int i, int j) { 'nNw
int temp = data; :5@cjj
data = data[j]; %>uGzQ61
data[j] = temp; j\nnx8`7
} eBTy!!
} ^c1I'9(r5