[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; *\", qMp
} 8BDL{?Mu
int i1=l; GwBQ pNjy
int i2=mid+1; |T*qAJ8c
for(int cur=l;cur<=r;cur++){ R:N-y."La.
if(i1==mid+1) +ctv]'P_
data[cur]=temp[i2++]; K5&C}Ey1
else if(i2>r) LnS>3$t*
data[cur]=temp[i1++]; MFuI&u!g:
else if(temp[i1] data[cur]=temp[i1++]; +`-a*U94
else /MH@>C _
data[cur]=temp[i2++]; Z"X*FzFo
} 8 -A7
} VsEAo
JxJntsn
} +_P 2S
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改进后的归并排序: Z;D3lbqE
S8m&Rj3O&
package org.rut.util.algorithm.support; PDng!IQ^
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import org.rut.util.algorithm.SortUtil; y>|XpImZ
*(B[J
/** 3:lp"C51
* @author treeroot nX%'o`f
* @since 2006-2-2 EG4bFmcs
* @version 1.0 [t{#@X
*/ %PbqASm
public class ImprovedMergeSort implements SortUtil.Sort { \[1CDz=}1
r:4IKuTR
private static final int THRESHOLD = 10; E2'e}RQ
ZGhoV#T@
/* J5_Y\@
* (non-Javadoc) WG}CPkj
* K-C-+RB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [[h)4H{T
*/ 9X9zIh]JV
public void sort(int[] data) { QYXx7h r=$
int[] temp=new int[data.length]; 'hw@l>1\9
mergeSort(data,temp,0,data.length-1); 5l0rw)
} O7'3}P;
Cf[F`pFM
private void mergeSort(int[] data, int[] temp, int l, int r) { NP'Ke:
int i, j, k; t<,p-TM]
int mid = (l + r) / 2; g4aX
if (l == r) GD{fXhgk
return; kDY]>v
if ((mid - l) >= THRESHOLD) `yX+NRi(s
mergeSort(data, temp, l, mid); eZ5}O0sfp
else T,2Dr;
insertSort(data, l, mid - l + 1); 2%C5P0;QX
if ((r - mid) > THRESHOLD) %W',cu
mergeSort(data, temp, mid + 1, r); R+VLoz*J6
else \Rqh|T<D
insertSort(data, mid + 1, r - mid); =^y{@[p`(
Z !25xqNCd
for (i = l; i <= mid; i++) { p6*a1^lU6
temp = data; %%cSvPcz
} u;ooDIq@
for (j = 1; j <= r - mid; j++) { ^.kAZSgO
temp[r - j + 1] = data[j + mid]; ZQ-`l:G
} qbq<O %g=
int a = temp[l]; VfqY_NmgC
int b = temp[r]; a {$k<@Ww
for (i = l, j = r, k = l; k <= r; k++) { 0k0c
if (a < b) { " IkF/
data[k] = temp[i++]; i2a"J&,6O
a = temp; L_1_y, 0N
} else { 1 lCikS^c
data[k] = temp[j--]; Jo aDX ,
b = temp[j]; |\n)<r_
} #IhLpO
} qL5#.bR
} ;AGs1j
3k*:B~1
/** :CST!+)o
* @param data *8X9lv.Z
* @param l \.;ct
* @param i =>}.W:=
*/ dwbY"t[9
private void insertSort(int[] data, int start, int len) { *RbOQ86vP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ph12x: @B
} ]n]uN~)9
} 7M#$: Fdb
} NQiecxvt=
} l9NOzAH3
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堆排序： l&??2VO/t
K*U=;*p)
package org.rut.util.algorithm.support; gLSG:7m@
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import org.rut.util.algorithm.SortUtil; ?I2k6%a
?WQd
/** Fr3d#kVR
* @author treeroot pG F5aF7T
* @since 2006-2-2 .1}rzh}8
* @version 1.0 ]AZ\5C-J
*/ M`+e'vdw
public class HeapSort implements SortUtil.Sort{ !P60[*>
_E1]cbIo
/* (non-Javadoc) H")N_BB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SeNF!k% Y
*/ .W@4vrp@
public void sort(int[] data) { K[LVT]3 n
MaxHeap h=new MaxHeap(); q"LJwV}W
h.init(data); y }&4HrT&
for(int i=0;i h.remove(); <% 7P
System.arraycopy(h.queue,1,data,0,data.length); }y-;>i#m=g
} ^0x.'G?
bg1"v a#2
private static class MaxHeap{ F;Q_*0mIQ
MX`Wg
void init(int[] data){ `mKlv~$1^
this.queue=new int[data.length+1]; > 0Twr
for(int i=0;i queue[++size]=data; BsK|:MM]
fixUp(size); aFr!PQp4{
} k99gjL`
} b1+hr(kMRM
9oje`Ay
private int size=0; #7~tL23}]
I*:qGr+ WJ
private int[] queue; J|"nwY}a9
x?f0Hk+
public int get() { Z.aLk4QO@
return queue[1]; Q k;Kn
} *qO]v9 j
i{|lsd(+
public void remove() { %uz|NRB=
SortUtil.swap(queue,1,size--); AFINm%\/0
fixDown(1); KcmDF4C2
} 8_<&f%/
file://fixdown esh$*)1
private void fixDown(int k) { u 5Eo
int j; z{`6#
while ((j = k << 1) <= size) { zJfK4o
if (j < size %26amp;%26amp; queue[j] j++; B-\,2rCCZ
if (queue[k]>queue[j]) file://不用交换 OK M\"A4
break; z)&naw.
SortUtil.swap(queue,j,k); 4/HY[FT
k = j; D%;wVnUw
} % UW=:
} A#Q0{z@H
private void fixUp(int k) { Ox7uG{t$#
while (k > 1) { -- i&"
int j = k >> 1; @Xq&t}*8
if (queue[j]>queue[k]) 7wiK.99
break; l$qStL*8O
SortUtil.swap(queue,j,k); YeRcf`
k = j; .K|P&
} BN\fv,
} i>tW|N
~']&.
} a9D gy_!Y
VMxYZkMNd_
} C!ZI&cD9
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SortUtil： (XbMrPKG
zdLVxL>87
package org.rut.util.algorithm; 2I]]WBW#:
UM4@H1
import org.rut.util.algorithm.support.BubbleSort; #$rf-E5g-K
import org.rut.util.algorithm.support.HeapSort; 00`bL
import org.rut.util.algorithm.support.ImprovedMergeSort; kZU"Xn
import org.rut.util.algorithm.support.ImprovedQuickSort; B^imG
import org.rut.util.algorithm.support.InsertSort; YW8K $W
import org.rut.util.algorithm.support.MergeSort; W>p\O9BG
import org.rut.util.algorithm.support.QuickSort; 5E]UI YAkV
import org.rut.util.algorithm.support.SelectionSort; hi;WFyJTu
import org.rut.util.algorithm.support.ShellSort; <CNE>@-f
4NpHX+=P
/** T>\nWancQM
* @author treeroot %PQldPL8
* @since 2006-2-2 H_%d3 RI
* @version 1.0 [<D+pqh
*/ $:f.Krj
public class SortUtil { tk`: CT *
public final static int INSERT = 1; 84[|qB,ML
public final static int BUBBLE = 2; 457fT|
public final static int SELECTION = 3; tXf}jU}
public final static int SHELL = 4; CDQJ bvx
public final static int QUICK = 5; I;Al?&uw
public final static int IMPROVED_QUICK = 6; \yih 1Om>~
public final static int MERGE = 7; U9<_6Bsd
public final static int IMPROVED_MERGE = 8; _-@ZOhw&
public final static int HEAP = 9; n\Z^K
tv 4s12&
public static void sort(int[] data) { Fy 4Tvg
sort(data, IMPROVED_QUICK); *oEv,I_
} `j"4:
private static String[] name={ ?gd'M_-J,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z6p#fsD
}; -]Q3/"Q
%$/=4f.j
private static Sort[] impl=new Sort[]{ D-Bv(/Pz]$
new InsertSort(), 51&|t#8h
new BubbleSort(), I`/]@BdgY
new SelectionSort(), dzgs%qtK
new ShellSort(), PzIy">plm
new QuickSort(), R&NpdW N
new ImprovedQuickSort(), 4|zd84g
new MergeSort(), b%3Q$wIJ6
new ImprovedMergeSort(), W:`5nj]H9
new HeapSort() 6b%`^B\
}; nHI(V-E2:H
`[X6#`<
public static String toString(int algorithm){ f|X[gL,B
return name[algorithm-1]; P7}t lHX
} lP}o[Rd
8BHL
public static void sort(int[] data, int algorithm) { F`fGz)Mk
impl[algorithm-1].sort(data); ,"@w>WL<9
} Vn)%C_-]A
i%xI9BO9
public static interface Sort { MPjr_yc]
public void sort(int[] data); hA@zoIoe
} nped
lN);~|IOv7
public static void swap(int[] data, int i, int j) { PASuf.U$"
int temp = data; d-hbvLn
data = data[j]; XXXljh6
data[j] = temp; j'k8^*M6
} L5R `w&Up
} ;JAK[o8i