[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; 5~F0'tb|}
} !R@4tSu
int i1=l; f*~fslY,o
int i2=mid+1; Ye6O!,R
for(int cur=l;cur<=r;cur++){ *~L]n4-
if(i1==mid+1) t*#&y:RG
data[cur]=temp[i2++]; I$LO0avvH2
else if(i2>r) jY.%~Y1y
data[cur]=temp[i1++]; e-CW4x
else if(temp[i1] data[cur]=temp[i1++]; zE/(F;> FV
else J"MJVMo$T
data[cur]=temp[i2++]; yB1>83!q
} u2Obb`p S
} ?rDwYG(u]@
y^rg%RV
} jg8P4s
n58jB:XR(
改进后的归并排序: _JDr?Kg
FM)*>ax{
package org.rut.util.algorithm.support; R2s>;V.:
t_dg$KB
import org.rut.util.algorithm.SortUtil; tK H!xit
Zv\b`Cf}
/** WGx>{'LJ
* @author treeroot #w@Pa L iS
* @since 2006-2-2 aB)DX
* @version 1.0 Z(eSnV_RL
*/ NZ5~\k
public class ImprovedMergeSort implements SortUtil.Sort { nE;gM1I
?OyW|jL
private static final int THRESHOLD = 10; (c2\:hvy
3lN+fQ>)S
/* Gp+XM
* (non-Javadoc) U;@jl?jnG
* Se`N5hQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oUSG`g^P(M
*/ 8|GpfW3p2
public void sort(int[] data) { j[cjQ]>~'
int[] temp=new int[data.length]; 1n"X?K5;A
mergeSort(data,temp,0,data.length-1); aO%FQ)BT
} V1`|j
sQs5z~#51*
private void mergeSort(int[] data, int[] temp, int l, int r) { mNel3J3
int i, j, k; )M 0O=Cl1
int mid = (l + r) / 2; Z(M)2
if (l == r) !X8R
return; u'1=W5$rK
if ((mid - l) >= THRESHOLD) T7~v40jn|
mergeSort(data, temp, l, mid); '=.Uz3D'0
else JUFO.m^w
insertSort(data, l, mid - l + 1); Q8oo5vqQ#C
if ((r - mid) > THRESHOLD) 5.#9}]
mergeSort(data, temp, mid + 1, r); >}*jsqaVU
else l)s+"C#
insertSort(data, mid + 1, r - mid); X~3P?O]kFv
ooSd6;'
for (i = l; i <= mid; i++) { Dt.Wb&V_w
temp = data; /nFw
} A#: c
for (j = 1; j <= r - mid; j++) { mU$7_7V~
temp[r - j + 1] = data[j + mid]; vKC&Qi ;
} HPKyAcS\
int a = temp[l]; vq7%SEkES
int b = temp[r]; 7F:;3c
for (i = l, j = r, k = l; k <= r; k++) { ~[q:y|3b
if (a < b) { `&zobbwq
data[k] = temp[i++]; 1I_q3{
a = temp; ^)l@7XxD
} else { @|Bp'`j%J
data[k] = temp[j--]; eE%yo3
b = temp[j]; _|:bac8pL
} U&$]?3?
} @ -d4kg
} \#,#_
"Cj#bUw
/** i6 ?JX@I
* @param data guXpHF=
* @param l 9[E$>o"%
* @param i F|`B2Gr
*/ [#'_@zZz
private void insertSort(int[] data, int start, int len) { Qmx~_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^3o8F
} [F[<2{FQF
} (1j$*?iGA
} L"6/"L
} $ _Bu,;
/ i2-h
堆排序： u>6/_^iq
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package org.rut.util.algorithm.support; , %O3^7i
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import org.rut.util.algorithm.SortUtil; E*CQG;^=N
!BuJC$
/** gr{Sh`Cm-
* @author treeroot 3|r!*+.
* @since 2006-2-2 pY>-N
* @version 1.0 G0Tc}_o<Y
*/ @M^QhHs
public class HeapSort implements SortUtil.Sort{ PVc|y.
YPDsE&,J)
/* (non-Javadoc) ,<r3Z$G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "sX?wTag
*/ SJ7=<y}[d
public void sort(int[] data) { <?Izfl6
MaxHeap h=new MaxHeap(); [Ms{J!^q
h.init(data); WTv\HI2X !
for(int i=0;i h.remove(); I jztj
System.arraycopy(h.queue,1,data,0,data.length); ]m#MwN$
} A""*vqA
<L ( =
private static class MaxHeap{ y"L`bl A9}
O[p^lr(B7
void init(int[] data){ UA4d|^ev
this.queue=new int[data.length+1]; 4?M3#],'h
for(int i=0;i queue[++size]=data; Xb:BIp!e
fixUp(size); fA0=Y,pzv
} JgKZ;GM:W
} NV(4wlh)y
eEGcio}_I9
private int size=0; T1!Gr!=
3=|2Gs?ut
private int[] queue; #33RhJu5,
aa%&&
public int get() { n9fA!Wic
return queue[1]; fy>And*
} bok 74U]
yP9wYF^A\
public void remove() { !Fg4Au
SortUtil.swap(queue,1,size--); EQOP?>mWx!
fixDown(1); p't:bR
} 4FE@s0M,
file://fixdown >AX~c jo
private void fixDown(int k) { ;(0$~O$3u
int j; :tqm2t
while ((j = k << 1) <= size) { x`6^+>y^
if (j < size %26amp;%26amp; queue[j] j++; Sc$8tLDLj
if (queue[k]>queue[j]) file://不用交换 FO>(QLlH
break; )Z]y.W)
SortUtil.swap(queue,j,k); 6?.pKFBZ
k = j; u#@{%kPW
} HGQ?(2]8$
} ^8l3j4
private void fixUp(int k) { Y0fO.k#C^
while (k > 1) { !a&SB*%^I3
int j = k >> 1; #!u51P1
if (queue[j]>queue[k]) $EGRaps{j>
break; V]kGcS}
SortUtil.swap(queue,j,k); VMye5 P
k = j; ._MAHBx+G
} dGD^op,6g
} DEQE7.]3q
CL'Xip')T
} xgT~b9
hn\Q6f+
} K_+;"G
oSA*~N:
SortUtil： b801OF
LUDJPIk
package org.rut.util.algorithm; 2 ssj(Qo
fxoi<!|iGY
import org.rut.util.algorithm.support.BubbleSort; Ag4Ga?&8ec
import org.rut.util.algorithm.support.HeapSort; -6~y$c&c
import org.rut.util.algorithm.support.ImprovedMergeSort; 1.95 ^8
import org.rut.util.algorithm.support.ImprovedQuickSort; uGUv~bE
import org.rut.util.algorithm.support.InsertSort; hKZ`DB4
import org.rut.util.algorithm.support.MergeSort; ,WB_C\.#XN
import org.rut.util.algorithm.support.QuickSort; c(V=.+J
import org.rut.util.algorithm.support.SelectionSort; %w8GGm8^/
import org.rut.util.algorithm.support.ShellSort; Jg|cvu-+
oAZF3h]po
/** MYw8wwX0kJ
* @author treeroot w0j/\XN2s
* @since 2006-2-2 2Jo~m_
* @version 1.0 ig2+XR#%
*/ >'}=.3\
public class SortUtil { ey\m)6A$
public final static int INSERT = 1; E R]sDV
public final static int BUBBLE = 2; BF@5&>E
public final static int SELECTION = 3; {s8U7rmML
public final static int SHELL = 4; bH\C5zt6(
public final static int QUICK = 5; =0PRAc
public final static int IMPROVED_QUICK = 6; M,t*nG
public final static int MERGE = 7; FJf~vAQ
public final static int IMPROVED_MERGE = 8; K4k~r!&OU
public final static int HEAP = 9; M6jp1:ZH2q
@<OO
public static void sort(int[] data) { 5Z9~ &U
sort(data, IMPROVED_QUICK); Z<ajET`)
} <wt$Gglk
private static String[] name={ @ 2!C^}d3F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .;HIEj zq
}; J}(6>iuQY?
;;?vgrz
private static Sort[] impl=new Sort[]{ ```d:f
new InsertSort(), n|x$vgb
new BubbleSort(), AUxM)H
new SelectionSort(), (/SGT$#8
new ShellSort(), jWXR__>.
new QuickSort(), %0yS98']g
new ImprovedQuickSort(), k6O.H
new MergeSort(), ;n} >C' :
new ImprovedMergeSort(), (rr}Pv%yb
new HeapSort() Gg9VS&VI
}; @q&|MMLt
?L@@;tt
public static String toString(int algorithm){ WDEe$k4.
return name[algorithm-1]; !.3R~0b
} % Cu.u)/+
cGE=.
public static void sort(int[] data, int algorithm) { Z6Nj<2u2
impl[algorithm-1].sort(data); (A29ZH
} ?h!t$QQ!M
-]Q(~'a
public static interface Sort { 6P~aW
public void sort(int[] data); gwSN>oj &
} /Fv/oY
0%s3Mp6H
public static void swap(int[] data, int i, int j) { IV{FH&t^T"
int temp = data; <t{?7_ 8
data = data[j]; s) Cpi
data[j] = temp; k7^R,.c@
} !TP6=ks
} ohrw\<xsu