[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; H(F9&6}
} &=hkB9 ;
int i1=l; uw9w{3]0f
int i2=mid+1; <l"rnM%
for(int cur=l;cur<=r;cur++){ $z'_Hr'
if(i1==mid+1) :,Ad1(
data[cur]=temp[i2++]; VfJdCg_
else if(i2>r) 9:]|TIPi
data[cur]=temp[i1++]; FpFkZFtG'm
else if(temp[i1] data[cur]=temp[i1++]; Ej/P:nB
else *K2fp=Ns
data[cur]=temp[i2++]; Bu,VLIba
} qBXIR}
} yc3i> w`
8VR! Y0`e
} hR%2[lBn!]
QKtVwsz +
改进后的归并排序: )SsO,E+t=U
#FsoK*F
package org.rut.util.algorithm.support; LQ.0"6oj
b?%Pa\,!
import org.rut.util.algorithm.SortUtil; T96M=?wh!
P'D'+qS
/** B5H=#
* @author treeroot :`20i*
* @since 2006-2-2 wBIhpiJX0
* @version 1.0 SbN.z
*/ E_j=v \
public class ImprovedMergeSort implements SortUtil.Sort { D|E,9|=v
W`` -/
private static final int THRESHOLD = 10; OZi4S3k
K:8. Dvn
/* <Z\j#p:
* (non-Javadoc) B*T;DE
* XI58Cy*!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g,d'&r"JWt
*/ b{hdEb
public void sort(int[] data) { wQw y+S
int[] temp=new int[data.length]; 6V6,m4e
mergeSort(data,temp,0,data.length-1); Q"b62+03
} |!.VpN&
cux<7#6af
private void mergeSort(int[] data, int[] temp, int l, int r) { v.Zr,Z=eV
int i, j, k; [-'LJG Wb<
int mid = (l + r) / 2; ^9A,j}>o-
if (l == r) V"R,omh
return; j<C p&}X
if ((mid - l) >= THRESHOLD) Sx}61?
mergeSort(data, temp, l, mid); 40R7@Vaf
else 71!'k>]h
insertSort(data, l, mid - l + 1); 7)37AKw
if ((r - mid) > THRESHOLD) S7WT`2
mergeSort(data, temp, mid + 1, r); ,G!mO,DX
else u<K{=94!e
insertSort(data, mid + 1, r - mid); h\PybSW4s
rv;is=#1
for (i = l; i <= mid; i++) { 8u4FagQ,
temp = data; lko k2
} njg\y
for (j = 1; j <= r - mid; j++) { M"|({+9eG
temp[r - j + 1] = data[j + mid]; nZ8f}R!f:
} ZIikDih1
int a = temp[l]; A,#a?O6m
int b = temp[r]; ;}E$>]*Yn
for (i = l, j = r, k = l; k <= r; k++) { UJhUb)}^
if (a < b) { 'NDDj0Y
data[k] = temp[i++]; 31=vUS
a = temp; _&|<(m&."
} else { u$V8fus0
data[k] = temp[j--]; m vLqccL
b = temp[j]; N4[^!}4
} `}|$eF&
} `as6IMqJD
} kli)6R<
4]mAV\1
/** <n{-&;>
* @param data ;LE9w^>^V
* @param l >}'WL($5U
* @param i W@FRKDixG
*/ ~Op~~ m
private void insertSort(int[] data, int start, int len) { `g!NFp9q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tmr%r'i3
} >^ijj`{d
} hz*H,E!>
} - j_
} 8bI;xjK^Q
pA?2UZ
堆排序： w~l%xiC
@]xHt&j
package org.rut.util.algorithm.support; drK &
,R2;oF_
import org.rut.util.algorithm.SortUtil; Lc5I?}:;L
[ %:%C]4
/** XL!^tMk
* @author treeroot rw]7Lr_>
* @since 2006-2-2 Z2^B.r#
* @version 1.0 `=JGlN7
*/ 6UnWtLE
public class HeapSort implements SortUtil.Sort{ O(CmdSk,
a?P$8NLr
/* (non-Javadoc) j=5hW.fI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r"\g6<RP
*/ XVWVY}
public void sort(int[] data) { UTph(U#
MaxHeap h=new MaxHeap(); YMD&U
h.init(data); atmTI`i
for(int i=0;i h.remove(); To@77.'
System.arraycopy(h.queue,1,data,0,data.length); 6BIr{SY
} =%ZR0cWPoI
9G=HG={
private static class MaxHeap{ CWW|?
b5.L== >
void init(int[] data){ 85 <%L:EC
this.queue=new int[data.length+1]; /Ym!%11`
for(int i=0;i queue[++size]=data; >P[BwL]
fixUp(size); :1,xse
} wS}Rl}#Oh?
} TU}./b@F
8PtX@s43\
private int size=0; BFH=cs
]#t5e>o|
private int[] queue; p4M7BK:nf
0D:eP``
public int get() { L qdzqq
return queue[1]; Sxg&73;ZV
} hsZ}FLStJ
qS}pv
public void remove() { )3A%Un#B
SortUtil.swap(queue,1,size--); -VPda @@w
fixDown(1); Z&j?@k,k
} |VE*_G
file://fixdown CyEEE2cV
private void fixDown(int k) { TATH,Sz:x
int j; FErKr)
while ((j = k << 1) <= size) { AB")aX2%E
if (j < size %26amp;%26amp; queue[j] j++; (3fU2{sm
if (queue[k]>queue[j]) file://不用交换 9G"-~C"e3
break; z1`z k0
SortUtil.swap(queue,j,k); )*I%rN8b
k = j; f+W8Gszi
} ruTj#tWSo
} C8bv%9
private void fixUp(int k) { W9%B9~\G;+
while (k > 1) { (D <o=Q
int j = k >> 1; fS?fNtD6<
if (queue[j]>queue[k]) Od@<L
break; vB;$AFh{
SortUtil.swap(queue,j,k); }}MZgm~U)
k = j; ct-;L' a
} ("-`Y'"K
} 6kM'f}t[C
%eDJ]\*^X
} PP_fTacX
?2$0aq
} Im8c
KuohUH+
SortUtil： .,7ZDO9{
U)y~{E~c34
package org.rut.util.algorithm; [V_?`M
JHIXTy__
import org.rut.util.algorithm.support.BubbleSort; 3PU'd^
import org.rut.util.algorithm.support.HeapSort; U**v'%{s
import org.rut.util.algorithm.support.ImprovedMergeSort; 4C[n@p2
import org.rut.util.algorithm.support.ImprovedQuickSort; hDc)\vzr
import org.rut.util.algorithm.support.InsertSort; [tY+P7j9)
import org.rut.util.algorithm.support.MergeSort; Yvbk[Rb
import org.rut.util.algorithm.support.QuickSort; [5O`
import org.rut.util.algorithm.support.SelectionSort; k>;a5'S
import org.rut.util.algorithm.support.ShellSort; z3>oUq{
%zA$+eT
/** y.m;4((
* @author treeroot S+Vsy(
* @since 2006-2-2 Yiy|^j
* @version 1.0 sg!*%*XQ
*/ LJII7<k
public class SortUtil { |`i.8
public final static int INSERT = 1; SP |R4*KY
public final static int BUBBLE = 2; wM#BQe3t#
public final static int SELECTION = 3; X=d;WT4,,
public final static int SHELL = 4; <<:a>)6\
public final static int QUICK = 5; #ZS8}X*S
public final static int IMPROVED_QUICK = 6; TSCc=c
public final static int MERGE = 7; u{"@ 4
public final static int IMPROVED_MERGE = 8; rGxX]
public final static int HEAP = 9; >W[#-jA_Z
sB>ZN3ptH^
public static void sort(int[] data) { YMEI J}
sort(data, IMPROVED_QUICK); ,H+LE$=
} Z6XP..
private static String[] name={ ^&-H"jF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZFsJeF'"
}; A7X-),D
|~I-
private static Sort[] impl=new Sort[]{ A}cGag+sp
new InsertSort(), |L"!^Y#=D
new BubbleSort(), byUz
new SelectionSort(), qn4jy6
new ShellSort(), <dA1n:3o
new QuickSort(), 7/$s!pV
new ImprovedQuickSort(), A"8"e*
new MergeSort(), rt7]~W-
new ImprovedMergeSort(), d3|oKP6
new HeapSort() r=3knCEWK
}; @JL+xfz
I N'a5&..
public static String toString(int algorithm){ J}vxK H#=
return name[algorithm-1]; =P.m5e<
} {Z=m5Dy}
Cw_XLMY%V1
public static void sort(int[] data, int algorithm) { (~<9\ZJs
impl[algorithm-1].sort(data); 6Wabw:
} E-_Q3^
/kY|PY
public static interface Sort { @^';[P!
public void sort(int[] data); 5V{zdS=
} /Xds+V^Z
SdTJ?P+m
public static void swap(int[] data, int i, int j) { s s*% 3<
int temp = data; l[EjtN
data = data[j]; MXj7Z3
data[j] = temp; AqzPwO^
} }`,}e259
} oIP<7gz