[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; a-,!K
} !-%i" a
int i1=l; &Jv j@,>$d
int i2=mid+1; wX" 6 S:
for(int cur=l;cur<=r;cur++){ .R;HH_
if(i1==mid+1) UHF.R>Ry
data[cur]=temp[i2++]; &aldnJ
else if(i2>r) ?h"+q8&
data[cur]=temp[i1++]; Xz&Hfs"/J
else if(temp[i1] data[cur]=temp[i1++]; &!vJ3:
else kN>%y&cK
data[cur]=temp[i2++]; abUvU26t
} )V%xbDdS
} (Sr&Y1D
pj G6v(zK
} z_~f/
7^#f<m;Ar!
改进后的归并排序: eyy{z;D8r
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package org.rut.util.algorithm.support; oJbD|m
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import org.rut.util.algorithm.SortUtil; .a1WwI
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/** [ /w{,+U
* @author treeroot y!;rY1
* @since 2006-2-2 hS}?"ST|
* @version 1.0 G2U=*|
*/ A!No:?S
public class ImprovedMergeSort implements SortUtil.Sort { }:7'C. ."
RxY ;'NY
private static final int THRESHOLD = 10; -mOSB(#bo
A9ia[2[
/* +^YXqOXU
* (non-Javadoc) E!&A[TlX\
* -bu.Ar-#;h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =0TnH<`
*/ mS5'q q;t
public void sort(int[] data) { '+N!3r{G
int[] temp=new int[data.length]; U0q{8 "Pl
mergeSort(data,temp,0,data.length-1); LCx{7bN1ro
} p<*3mbgGO
os|8/[gT
private void mergeSort(int[] data, int[] temp, int l, int r) { {v+,U}
int i, j, k; \:-#,( .V
int mid = (l + r) / 2; S(eCG2gR
if (l == r) P7O$*
return; )1wC].RFYm
if ((mid - l) >= THRESHOLD) 4eK!1|1
mergeSort(data, temp, l, mid); im|( 4f
else #\[h.4i
insertSort(data, l, mid - l + 1); a,tzt ]>
if ((r - mid) > THRESHOLD) lfp[(Ph)9
mergeSort(data, temp, mid + 1, r); &[$qA
else eRc+.m[
insertSort(data, mid + 1, r - mid); Qyvn A|&
C']TO/2q
for (i = l; i <= mid; i++) { z^$DXl@)h
temp = data; Yb\t0:_
} wl1i@&9
for (j = 1; j <= r - mid; j++) { KWbnSL8
temp[r - j + 1] = data[j + mid]; ?pn<lW8d
} D*BZp0x
int a = temp[l]; .|iMKRq
int b = temp[r]; iZ %KHqG
for (i = l, j = r, k = l; k <= r; k++) { h3D~?Iom
if (a < b) { \fIGMoy!
data[k] = temp[i++]; AVf'"~?
a = temp; UjxEbk5>^
} else { . >[d:0
data[k] = temp[j--]; 8+K=3=05#U
b = temp[j]; v7&oHOk!
} ["Mq
} xDU>y
} lx$]f)%~
ivDmPHj{
/** 6x|"1 G{
* @param data 'RK.w^
* @param l ~sj'GEhEg
* @param i `!WtKqr%B
*/ JoeU J3N
private void insertSort(int[] data, int start, int len) { a,g3/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s\i:;`l:=5
} |&OW_*l
} 5SPhdpIg@[
} uvR9BL2=
} JLo'=(
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堆排序： XCr\Y`,Z@
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package org.rut.util.algorithm.support; 4Gz5Ju
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import org.rut.util.algorithm.SortUtil; };;\&#
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/** \ldjWc<S
* @author treeroot nF$n[:
* @since 2006-2-2 ,ab_u@
* @version 1.0 W[Kv Qt3%
*/ 8axz`2`
public class HeapSort implements SortUtil.Sort{ !-%fCg(B
o zg%-
/* (non-Javadoc) 7OuzQzhcK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n[DQ5l
*/ &D@/_m $
public void sort(int[] data) { n.9k<
MaxHeap h=new MaxHeap(); vC$Q4>m
h.init(data); HQPb
for(int i=0;i h.remove(); fXfBDB
System.arraycopy(h.queue,1,data,0,data.length); [MLJs-*
} >d#oJ?goX
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private static class MaxHeap{ }xhat,9
5'iJN$7
void init(int[] data){ mBWE^
this.queue=new int[data.length+1]; 70pt5O3]
for(int i=0;i queue[++size]=data; eyq\a'tyB
fixUp(size); YbCqZqk
} >!u@>
} 1K(a=o[Ce
S}fU2Wi
private int size=0; QY14N{]T\p
}{FKs!(4
private int[] queue; X^204K%:
C-25\
public int get() { )gM3,gSS
return queue[1]; r=57,P(:Ca
} X3nt*G1dL
Bfh[C]yy
public void remove() { b-Fv vA
SortUtil.swap(queue,1,size--); tF:'Y ~3 p
fixDown(1); J6m`XC
} -anLp8G*
file://fixdown BPf;!.
private void fixDown(int k) { VjZ_L_U}
int j; /rMxl(wD'
while ((j = k << 1) <= size) { DGfhS`X
if (j < size %26amp;%26amp; queue[j] j++; *qx<bY@F
if (queue[k]>queue[j]) file://不用交换 *Nfn6lVB
break; \Xy]z
SortUtil.swap(queue,j,k); z^(6>U ?
k = j; O[nl#$w
} `D2wlyqO6
} &!)F0PN:u
private void fixUp(int k) { -Vj'QqZ
while (k > 1) { \)?mIwo7~
int j = k >> 1; L|sWSrqd
if (queue[j]>queue[k]) Ub1?dk
break; -I, _{3.S
SortUtil.swap(queue,j,k); 44s K2
k = j; ]J=S\
} C):RE<X
} eFO+@
n])-+[F
} M~&|-Hm
#3uBq(-Z
} >z=_V|^$
o;#{N~4[$
SortUtil： s3G\L<~mB
= mnjIp
package org.rut.util.algorithm; m~K[+P
HSt|Ua.c/h
import org.rut.util.algorithm.support.BubbleSort; kBPFk t2
import org.rut.util.algorithm.support.HeapSort; m7:E73:
import org.rut.util.algorithm.support.ImprovedMergeSort; Salu[)+?
import org.rut.util.algorithm.support.ImprovedQuickSort; %}z/_QZ
import org.rut.util.algorithm.support.InsertSort; xP@VK!sc
import org.rut.util.algorithm.support.MergeSort; ` eB-C//
import org.rut.util.algorithm.support.QuickSort; 1[k~*QS
import org.rut.util.algorithm.support.SelectionSort; 9JF*xXd>Q
import org.rut.util.algorithm.support.ShellSort; id^U%4J
2>{_O?UN
/** \L#BAB6z
* @author treeroot uj.~/W1,!
* @since 2006-2-2 Lh=~3
* @version 1.0 WY@x2bBi
*/ 9"yBO`
public class SortUtil { =k4yWC5-
public final static int INSERT = 1; /Vpd*obMB
public final static int BUBBLE = 2; cz_4cMgxu
public final static int SELECTION = 3; !'14mN#A
public final static int SHELL = 4; V/5hEoDt
public final static int QUICK = 5; h6*=Fn7C
public final static int IMPROVED_QUICK = 6; T[$Sbz`
public final static int MERGE = 7; `1%SXP1
public final static int IMPROVED_MERGE = 8; {HqwpB\@
public final static int HEAP = 9; Df_W>QC
&`7~vA&c
public static void sort(int[] data) { ':,6s
sort(data, IMPROVED_QUICK); )k&pp^q\
} 1fbd/-h
private static String[] name={ fgxsC7P$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c$f|a$$b
}; ixJUqo
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private static Sort[] impl=new Sort[]{ inBd.%Yr
new InsertSort(), H*QN/{|RU
new BubbleSort(), c ;3bX6RD*
new SelectionSort(), PN:8H>
new ShellSort(), /p,D01Ws}(
new QuickSort(), 3)f=Z2U>
new ImprovedQuickSort(), (PYUfiOf
new MergeSort(), m[^;HwJ
new ImprovedMergeSort(), =J8)Z'Jr
new HeapSort() .}fc*2.'
}; MCma3^/1
@C=, >+D
public static String toString(int algorithm){ h3;Ij'
return name[algorithm-1]; PMZdz>>T
} VGcl)fIqw?
V,qZF=}S
public static void sort(int[] data, int algorithm) { f}4c#x
impl[algorithm-1].sort(data); 'Rfvr7G/?
} V>P\yr?
Y6A]dk
public static interface Sort { @];#4O
public void sort(int[] data); a73b/_zZ=
} xsRMF&8L
/3%]Ggwe
public static void swap(int[] data, int i, int j) { /2u;w!oi.
int temp = data; v\Y;)/!
data = data[j]; '$)Wp_
data[j] = temp; mxHNK4/
} _}]o~
} ZP)=2'RY