[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; <J509j
} j>8DaEfwx
int i1=l; =rKJJa N
int i2=mid+1; b.*LmSX#
for(int cur=l;cur<=r;cur++){ c^}G=Z1@
if(i1==mid+1) yan^\)HZ
data[cur]=temp[i2++]; \Qml~?$@lH
else if(i2>r) (p]FI#y
data[cur]=temp[i1++]; ?Y"%BS+pt
else if(temp[i1] data[cur]=temp[i1++]; 161P%sGx2
else MA .;=T
data[cur]=temp[i2++]; la[pA
} XgxE M1(
} 2w|5SK_
"GMU~594
} JFv70rBe
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改进后的归并排序: T//xxH]w-
kn3w6]
package org.rut.util.algorithm.support; RELNWr
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import org.rut.util.algorithm.SortUtil; *aErwGLB8
.W]k8N E
/** r1!1u7dr t
* @author treeroot ]V"P &;m
* @since 2006-2-2 v[L+PD U
* @version 1.0 a (U52dO,
*/ TdFU,
public class ImprovedMergeSort implements SortUtil.Sort { IQ_6DF
; Y/nS
private static final int THRESHOLD = 10; j!+jLm!l
f:PlMv!{
/* oh5'Isb$
* (non-Javadoc) }c G)$E
* BX_yC=S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |>Q>d8|k
*/ ]zx%"SUM
public void sort(int[] data) { ^ITF*
int[] temp=new int[data.length]; @=kgK[t 9
mergeSort(data,temp,0,data.length-1); ky2]%cw
} ?:r?K|Ku
aRTy=~
private void mergeSort(int[] data, int[] temp, int l, int r) { 're:_;lG
int i, j, k; FJn-cR.n
int mid = (l + r) / 2; o~$O$
if (l == r) E{ /, b)
return; |WB-Ng
if ((mid - l) >= THRESHOLD) )N 3^r>(e<
mergeSort(data, temp, l, mid); AJyNlQ
else >pu4G+M
insertSort(data, l, mid - l + 1); /3s&??{tv
if ((r - mid) > THRESHOLD) T0 K!Msz
mergeSort(data, temp, mid + 1, r); 2^[dy>[y0
else *}2L4]
insertSort(data, mid + 1, r - mid); X]y:uD{
vW?\bH7}I
for (i = l; i <= mid; i++) { kZe<<iv
temp = data; <7P[)X_
} q>_<\|?%x
for (j = 1; j <= r - mid; j++) { mZ71_4X#
temp[r - j + 1] = data[j + mid]; 36.,:!%p
} }MaY:PMA
int a = temp[l]; WW:G( \`
int b = temp[r]; Avw=*ZW
for (i = l, j = r, k = l; k <= r; k++) { oC`F1!SfOO
if (a < b) { :M(uP e=D
data[k] = temp[i++]; !.P||$x`&
a = temp; !E$$FvL
} else { ,rMDGZm?
data[k] = temp[j--]; <AU*lLZ
b = temp[j]; g8O6 b
} W ^'|{9&m
} <,CrE5Pl
} U:8[%a
<0d2{RQ;
/** G*z\ ^H
* @param data qyM/p.mP
* @param l J>(X0@eWz
* @param i a&>NuMDI
*/ QIiy\E%
private void insertSort(int[] data, int start, int len) { h0<PQZJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?^voA.Bv<
} cWAw-E5
} %`F;i)Zz
} uZ6krI
} C8K2F5c5
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堆排序： ko9}?qs
`,]Bs*~
package org.rut.util.algorithm.support; CH6 m
1<ag=D`F_"
import org.rut.util.algorithm.SortUtil; ^+x?@$rq
^fsMfB
/** 6*i**
* @author treeroot G _cJI
* @since 2006-2-2 c)#P}Ai
* @version 1.0 l5-[a
*/ ,D{7=mDVm
public class HeapSort implements SortUtil.Sort{ X,Na4~JO(
{KgA V
/* (non-Javadoc) 2 GRI<M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rpKZ>S|7+)
*/ nJe}U#
public void sort(int[] data) { n^nE&'[?0g
MaxHeap h=new MaxHeap(); x3ZF6)@
h.init(data); B@F@,?K4%
for(int i=0;i h.remove(); FJeh=\
System.arraycopy(h.queue,1,data,0,data.length); @jn&Wf?
} m?kiGC&m
AM-bs^
private static class MaxHeap{ -PV1x1|
*I 1H
void init(int[] data){ X%b1KG|#(
this.queue=new int[data.length+1]; %mC@}
for(int i=0;i queue[++size]=data; irQ'Rm[
fixUp(size); L('1NN2
} $e+sqgU
} AERJ]$\
]LB_ @#
private int size=0; f30J8n"k
~A>fB2.pM
private int[] queue; F CYGXtc
M5no4P<
public int get() { HJ&P[zV^
return queue[1]; {VAih-y
} _^ENRk@
@bg9 }Z%\h
public void remove() { ?;,;
SortUtil.swap(queue,1,size--); |O(>{GH
fixDown(1); t9`{^<LH
} /1EAj
file://fixdown qA[lL(
private void fixDown(int k) { 2W+~{3[#
int j; vzSb(
while ((j = k << 1) <= size) { DvH-M3
if (j < size %26amp;%26amp; queue[j] j++; W_B=}lP@x
if (queue[k]>queue[j]) file://不用交换 jZ.yt+9
break; _^FC9
SortUtil.swap(queue,j,k); SWrTM
k = j; W'4/cO
} ?("O.<
} ^$Y9.IH"
private void fixUp(int k) { [-\Y?3
while (k > 1) { +0Q
int j = k >> 1; :^y!z1\2(7
if (queue[j]>queue[k]) [S'1OR$FQ\
break; Q:q0C +T
SortUtil.swap(queue,j,k); kgo#JY-4
k = j; >SXSrXyYX
} k>ErDv8
} _9>,9aL
Hf('BagBL
} SRfh{u
[~N;d9H+*1
} =RWTjTZ
W^iK9|[qp
SortUtil： &%fcGNzJQ
CA#g(SiZ
package org.rut.util.algorithm; eJoM4v
`ArUoYbB
import org.rut.util.algorithm.support.BubbleSort; ;VLDXvGd
import org.rut.util.algorithm.support.HeapSort; ^/#+0/Bn
import org.rut.util.algorithm.support.ImprovedMergeSort; 5[;[Te9=S
import org.rut.util.algorithm.support.ImprovedQuickSort; e_b,{l#
import org.rut.util.algorithm.support.InsertSort; Ii+3yE@c
import org.rut.util.algorithm.support.MergeSort; $U[d#:]
import org.rut.util.algorithm.support.QuickSort; 1>e30Ri,g
import org.rut.util.algorithm.support.SelectionSort; y11^q*}
import org.rut.util.algorithm.support.ShellSort; 1]If< <
oEX,\@+u
/** i~Tt\UA>
* @author treeroot xCZ_x$bk
* @since 2006-2-2 4$R!)
* @version 1.0 [#GBn0BG)
*/ 3uYLA4[-B
public class SortUtil { W5u5!L/
public final static int INSERT = 1; nWsRauY
public final static int BUBBLE = 2; jgE{JK\n4
public final static int SELECTION = 3; [R4#bl
public final static int SHELL = 4; 9(]_so24,
public final static int QUICK = 5; cB,^?djJ3
public final static int IMPROVED_QUICK = 6; *fm?"0M5
public final static int MERGE = 7; Fbo"Csn_
public final static int IMPROVED_MERGE = 8; *z[vp2 TN
public final static int HEAP = 9; 9i\}^s2
Tu(:?
public static void sort(int[] data) { z<eu=OD4t
sort(data, IMPROVED_QUICK); K#A&
} <4TI;yy6?
private static String[] name={ Y@ v][Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %R$)bGT
}; q.J6'v lj/
SAnr|<Y/
private static Sort[] impl=new Sort[]{ 3X(^`lAf)
new InsertSort(), ZSNbf|ldiE
new BubbleSort(), Vu(NP\Wm
new SelectionSort(), 3.YH7rN
new ShellSort(), | +;ZC y
new QuickSort(), DG;u_6;JR
new ImprovedQuickSort(), XtO..{qU
new MergeSort(), ftY&Q#[
new ImprovedMergeSort(), #)S}z+I
new HeapSort() b]]k\b
}; .!~ysy
.Vt|;P}
public static String toString(int algorithm){ Qb@j8Xa4[
return name[algorithm-1]; ;,-)Z|W
} |Kd6.Mx
@ fMlbJq
public static void sort(int[] data, int algorithm) { D&m1yl@\J
impl[algorithm-1].sort(data); dFg&|Lp
} {b-C,J
6Y[&1c8
public static interface Sort { s>;"bzzq
public void sort(int[] data); oRd{?I&NY
} <vl(a*4a
)[hs#nKTh
public static void swap(int[] data, int i, int j) { !&OdbRHM
int temp = data; Kj?)]Z4
data = data[j]; *4~7p4[
data[j] = temp; >> cW0I/`
} ?4SYroXUX|
} q[/g3D\G