[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; !94qF,#1
} ,uoK'_
int i1=l; yor6h@F1
int i2=mid+1; 0^('hS&
for(int cur=l;cur<=r;cur++){ , ;$SRQ.
if(i1==mid+1) m:-=K
data[cur]=temp[i2++]; 0]k-0#JM
else if(i2>r) yt+d f0l
data[cur]=temp[i1++]; P!xN]or]u
else if(temp[i1] data[cur]=temp[i1++]; ZVIlVuZ}
else ]L6[vJHx
data[cur]=temp[i2++]; IoKN.#;^
} GtLnh~)
} |\BxKwS^
Gr&YzbSX
} /0 2-0mNv
s:zz8oN
改进后的归并排序: @V=HY
R1?LB"aN
package org.rut.util.algorithm.support; 9M;k(B!
RLNto5?
import org.rut.util.algorithm.SortUtil; zBjbH=
hMnJH_siY
/** ~5:-;ZbZ
* @author treeroot ~O8Xj6
* @since 2006-2-2 ]k)h<)nY
* @version 1.0 jI!WE$dt
*/ _1ax6MwX
public class ImprovedMergeSort implements SortUtil.Sort { `xsU'Wd^<
g9G 8;
private static final int THRESHOLD = 10; q?$<{Z"
IA~wmOF
/* 5:vy_e&
* (non-Javadoc) C^ 1;r9
* l<-0@(x)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~{$5JIpCm
*/ <G60R^o
public void sort(int[] data) { /SKgN{tWe
int[] temp=new int[data.length]; f9a_:]F
mergeSort(data,temp,0,data.length-1); Yq0jw&v
} VRA0p[
Sp\ 7
private void mergeSort(int[] data, int[] temp, int l, int r) { ->*'Y;t4
int i, j, k; :\69N/uw`
int mid = (l + r) / 2; EZ)$lw/!J
if (l == r) EF8'ycJk+
return; ZnZ`/zNO
if ((mid - l) >= THRESHOLD) !cA4erBP
mergeSort(data, temp, l, mid); |.{[%OJP
else LgJUMR8vUO
insertSort(data, l, mid - l + 1); us>$f20T
if ((r - mid) > THRESHOLD) fl*>m,
mergeSort(data, temp, mid + 1, r); \{{i:&] H
else M&ec%<lM
insertSort(data, mid + 1, r - mid); !A=>B=.|D
Y N*"q'Yz_
for (i = l; i <= mid; i++) { Hq."_i{I
temp = data; -iySU 6
} vJfj1 f
for (j = 1; j <= r - mid; j++) { pa2cM%48
temp[r - j + 1] = data[j + mid]; *,#T&M7D
} [*z`p;n2D
int a = temp[l]; Wer.VL
int b = temp[r]; jQi)pVT^
for (i = l, j = r, k = l; k <= r; k++) { W8Aii'Q8C/
if (a < b) { wJ>2}
data[k] = temp[i++]; &!KW[]i%9}
a = temp; 69JC!du
} else { *c'hmAs
data[k] = temp[j--]; 3fhlMOm
b = temp[j]; =plU3D2
} v6*8CQ+
} <j&LC /]o
} U`)o$4Bq
KpSho<
/** 99u9L)
* @param data 3!2TE-
* @param l &pEr;:E
* @param i HiPd|D
*/ 'bx$}w N
private void insertSort(int[] data, int start, int len) { HWxwG'EEY,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \Ss6F]K]
} m6YDyQC
} obtXtqew
} xq\A TON
} f,WAl\
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堆排序： nEbJ,#>Z
a_amO<!
package org.rut.util.algorithm.support; Hl b%/&
QTbv3#
import org.rut.util.algorithm.SortUtil; m j@{hGP
JVt(!%K}&
/** k+`e0Jago
* @author treeroot V7q-Pfh!y
* @since 2006-2-2 q}MPl2
* @version 1.0 ]}HuK#
*/ mrId`<L5l{
public class HeapSort implements SortUtil.Sort{ 6ujePi <U
#P5tTCM
/* (non-Javadoc) sJB::6+1(|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >uVr;,=y
*/ 1Aw/-FxJ
public void sort(int[] data) { #azD&6`
MaxHeap h=new MaxHeap(); 61=D&lb
h.init(data); -1<*mbb0
for(int i=0;i h.remove(); 6y}|IhX?z
System.arraycopy(h.queue,1,data,0,data.length); eZk4$y
} 3PgiV%]
zD%@3NA41
private static class MaxHeap{ HL34pmc
CH4 ~9mmE
void init(int[] data){ Y!nxHRE
this.queue=new int[data.length+1]; ! C|VX,w
for(int i=0;i queue[++size]=data; |Y|gT*v
fixUp(size); lCC(N?%Q
} j_Qkw ?
} C,#FH}
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private int size=0; bj`mQMC
3gNVnmZG
private int[] queue; +c-?1j
rA6lyzJ
public int get() { T~JE.Y3B3
return queue[1]; 64w4i)?eM[
} )%D>U
b%"Lwqdr7
public void remove() { >YuiCf?c7
SortUtil.swap(queue,1,size--); lx"#S'^~
fixDown(1); QGpAG#M9?
} 568qdD`PS
file://fixdown 2c4x=%
private void fixDown(int k) { Q{"QpVY8
int j; sm>5n_Vw
while ((j = k << 1) <= size) { Vi o ~2
if (j < size %26amp;%26amp; queue[j] j++; qmWn$,ax
if (queue[k]>queue[j]) file://不用交换 NQ"`F,T
break; @$ggPrs
SortUtil.swap(queue,j,k); AHl1{* [
k = j; [d}AlG!
} (M,IgSn9
} F|3iKK022
private void fixUp(int k) { 6x8P}?
while (k > 1) { 8,m3]Lg
int j = k >> 1; :^[HDI-[2
if (queue[j]>queue[k]) !&b wFO>P
break; .,$<waGD
SortUtil.swap(queue,j,k); ]|PDsb"e
k = j; 1?j['~aE
} @x@*=
} Fo@cz"%
3sy|pa
} Sp>v`{F
/ Hg/)
} M)v4>Rw+
G378,H
SortUtil： eK=<a<tx
t/`~(0F
package org.rut.util.algorithm; H:jx_
{ICW"Rlcs
import org.rut.util.algorithm.support.BubbleSort; -IF3'VG
import org.rut.util.algorithm.support.HeapSort; nnol)|C{5Y
import org.rut.util.algorithm.support.ImprovedMergeSort; ^^C@W?.z
import org.rut.util.algorithm.support.ImprovedQuickSort; yl'@p5n
import org.rut.util.algorithm.support.InsertSort; (yB)rBh>n
import org.rut.util.algorithm.support.MergeSort; xG|T_|?
import org.rut.util.algorithm.support.QuickSort; ;ZVT[gi*
import org.rut.util.algorithm.support.SelectionSort; 'gQ0=6(\
import org.rut.util.algorithm.support.ShellSort; K6s%=.Zi(
|>U:Pb(
/** 0`D` Je<t
* @author treeroot iF#|Z$g-(
* @since 2006-2-2 2V6kCy@V
* @version 1.0 eK)R=M@i
*/ mIy|]e`SJ
public class SortUtil { 8\H*Z2yF+
public final static int INSERT = 1; 8nSEAr~
public final static int BUBBLE = 2; Jv+N/+M47
public final static int SELECTION = 3; yy*8Aw}
public final static int SHELL = 4; CfMCc:8mL
public final static int QUICK = 5; rQ*Fc~^L
public final static int IMPROVED_QUICK = 6; 2/ES.>K!.
public final static int MERGE = 7; <RaM@E
public final static int IMPROVED_MERGE = 8; ZJ Ke}F`l
public final static int HEAP = 9; N">4I)
eGF+@)K1"
public static void sort(int[] data) { `{GI^kgJ9
sort(data, IMPROVED_QUICK); a6<UMJ
} pSC\[%K
private static String[] name={ #FNSE*Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [S<1|hk s(
}; !Yi2g-(
?Xq"Q^o4#e
private static Sort[] impl=new Sort[]{ 9>I&Z8J$M
new InsertSort(), (O@fgBM
new BubbleSort(), uZ/XI {/
new SelectionSort(), g;n6hXq4
new ShellSort(), kQt#^pO)
new QuickSort(), ><Awk~KR
new ImprovedQuickSort(), 3<%ci&B
new MergeSort(), ^_rBEyz@
new ImprovedMergeSort(), Nm.G,6<J
new HeapSort() yPXa
}; c`E0sgp
YQ7\99tj
public static String toString(int algorithm){ P]mJ01@'
return name[algorithm-1]; fb*h.6^y9
} *+|,rcI
:H(wW
public static void sort(int[] data, int algorithm) { Q dPqcw4+X
impl[algorithm-1].sort(data); H,q-*Kk
} ;rqW?':(i
9m+ejTK{U
public static interface Sort { km,I75o.
public void sort(int[] data); !-cK@>.pE
} GVKc4HGt
1&.q#,EMn(
public static void swap(int[] data, int i, int j) { $c0<I59&|
int temp = data; N7 ox#=g
data = data[j]; V<&^zIJUR
data[j] = temp; ARd*c?Om
} nd#owjB
} o6Jhl8