[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; wCLniCt
} )Ac,F6w
int i1=l; +S(# 7
int i2=mid+1; 3/n?g7B
for(int cur=l;cur<=r;cur++){ ?Xypn#OPt
if(i1==mid+1) Y`ip.Nx
data[cur]=temp[i2++]; Bzwll
else if(i2>r) \T_ZcV
data[cur]=temp[i1++]; f~mwDkf?L
else if(temp[i1] data[cur]=temp[i1++]; 6P _+:Mf
else F-|DZ?)k5
data[cur]=temp[i2++]; u9S*2'
} }=bzUA`C
} UDi(7c0.
iw,uwh|L
} PkDt-]G.
'W_NRt:
改进后的归并排序: nb/q!8
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package org.rut.util.algorithm.support; 2PSExK57
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import org.rut.util.algorithm.SortUtil; 8m iJQIq
^;PjO|mD Z
/** QZvQ8
* @author treeroot {k.:DH)
* @since 2006-2-2 fKY-@B[|
* @version 1.0 7Fo^:"
*/ j.Uy>ol
public class ImprovedMergeSort implements SortUtil.Sort { ]}g\te
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private static final int THRESHOLD = 10; PxrT@.T$
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/* EX{%CPp7}
* (non-Javadoc) :.g/=Q(T~
* 8`+=~S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qLLrR,:
*/ <Y"RsW9
public void sort(int[] data) { F(`|-E"E;
int[] temp=new int[data.length]; d {U%q d
mergeSort(data,temp,0,data.length-1); +&G(AW
} ENhLonMeV
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private void mergeSort(int[] data, int[] temp, int l, int r) { s7 nl
int i, j, k; ZUHW*U.
int mid = (l + r) / 2; @~hy'6/
if (l == r) k)>H=?mI
return; Ql5bjlQdO
if ((mid - l) >= THRESHOLD) o i'iZX
mergeSort(data, temp, l, mid); ),N,!15j,
else ~fkcal1@
insertSort(data, l, mid - l + 1); q#AEu xI1
if ((r - mid) > THRESHOLD) M(+Pd_c6
mergeSort(data, temp, mid + 1, r); 8+w*,Ry`
else ]}/Rl}_
insertSort(data, mid + 1, r - mid); ,HDhP
ASy?^Jrs5
for (i = l; i <= mid; i++) { 7(o`>7x*
temp = data; D@uVb4uK
} o$L%t@
for (j = 1; j <= r - mid; j++) { |E6_TZ#=
temp[r - j + 1] = data[j + mid]; e: Sd#H!
} JR`$t~0t
int a = temp[l]; xwD`R*
int b = temp[r]; ir.RO7f
for (i = l, j = r, k = l; k <= r; k++) { cL#-vW<s3
if (a < b) { *RS/`a;,
data[k] = temp[i++]; Fya*[)HBo
a = temp; }'wZ)N@
} else { $BehU
data[k] = temp[j--]; c9EtUv~
b = temp[j]; _$$.5?4
} ^)]U5+g?
} F,S)P`?
} u=nd7:bv
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/** zl8M<z1`1
* @param data i=<;$+tW
* @param l cu>(;=
* @param i }6a}8EyFP
*/ )@DDs(q=i
private void insertSort(int[] data, int start, int len) { =!SV;^-q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1]''@oh{6U
} Ld.9.d]
} nQV0I"f]?]
} $#f_p-N
} u4FD}nV
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堆排序： =At" Q6-O
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package org.rut.util.algorithm.support; QErdjjgE
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import org.rut.util.algorithm.SortUtil; V. i{IW
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/** 8:c=h/fa
* @author treeroot vzs4tkG
* @since 2006-2-2 fWJpy#/^*K
* @version 1.0 OcV,pJ
*/ eef&ZL6g
public class HeapSort implements SortUtil.Sort{ t!3s@
O#;sY`fy_M
/* (non-Javadoc) `oNJ=,p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2LN6pu
*/ X7-*`NI^
public void sort(int[] data) { A"pQOtrm\k
MaxHeap h=new MaxHeap(); \;MP|:{pU
h.init(data); [ S
for(int i=0;i h.remove(); }.045 Wuu
System.arraycopy(h.queue,1,data,0,data.length); AHn!>w,
} }kQ{T:q4
zB0*KgAn{
private static class MaxHeap{ 'A5T$JV.r4
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void init(int[] data){ MuMq%uDA"
this.queue=new int[data.length+1]; W2rd[W
for(int i=0;i queue[++size]=data; LQk^l`
fixUp(size); LTS{[(%
} &Cb,C+q
} M7?ktK9`ma
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private int size=0; ',g%L_8Sq
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private int[] queue; Ojz'p5d`>
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public int get() { Nzgi)xX0HX
return queue[1]; ?xv."I%
} `w#VYs|k
nxV!mh_
public void remove() { OEaL2T
SortUtil.swap(queue,1,size--); 6oLOA}q
fixDown(1); eb`3'&zV&)
} &c!6e<o[p
file://fixdown vC>2%Zgf-
private void fixDown(int k) { })<u~r
int j; O^CBa$
while ((j = k << 1) <= size) { uQc("F
if (j < size %26amp;%26amp; queue[j] j++; F-zIzzb&O
if (queue[k]>queue[j]) file://不用交换 h[qZM
break; ?7wcv$K5
SortUtil.swap(queue,j,k); k^|z.$+
k = j; ox`Zs2-a
} ppn 8
} <QvVPE}z
private void fixUp(int k) { RuYIG?J=/
while (k > 1) { 67&IaDts
int j = k >> 1; uMva5o
if (queue[j]>queue[k]) ]/Nt
break; 7xO05)bz
SortUtil.swap(queue,j,k); _+9i
k = j; |U1 [R\X
} A z@@0
} :|kO}NGM
;b65s9n^b
} *w0|`[P+h
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} ds+K7B$
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SortUtil： I,#E`)
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package org.rut.util.algorithm; @,1_CqV
@` Pn<_L
import org.rut.util.algorithm.support.BubbleSort; `lE&:)
import org.rut.util.algorithm.support.HeapSort; I~F&@
import org.rut.util.algorithm.support.ImprovedMergeSort; ,nL~?h-Zh
import org.rut.util.algorithm.support.ImprovedQuickSort; j[i*;0) |
import org.rut.util.algorithm.support.InsertSort; p5E okh
import org.rut.util.algorithm.support.MergeSort; >;Oa|G
import org.rut.util.algorithm.support.QuickSort; C)FO:lLr\
import org.rut.util.algorithm.support.SelectionSort; @C@9Tw2Y
import org.rut.util.algorithm.support.ShellSort; QyL]-zNg
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/** vkJyD/;=
* @author treeroot N KgEs
* @since 2006-2-2 kM4z %
* @version 1.0 e@VJ-s
*/ X=-=z5
public class SortUtil { 2~/`L=L
public final static int INSERT = 1; XdDQ$'*X
public final static int BUBBLE = 2; SujEF`"
public final static int SELECTION = 3; CC!`fX6z>h
public final static int SHELL = 4; Pi=FnS
public final static int QUICK = 5; aWimg6q
public final static int IMPROVED_QUICK = 6; |-vyhr0
public final static int MERGE = 7; 0vLx={i
public final static int IMPROVED_MERGE = 8; 1J1Jp|j.
public final static int HEAP = 9; *A!M0TK?i,
A4(L47^
public static void sort(int[] data) { XM!oN^
sort(data, IMPROVED_QUICK); DZL(G [
} i7T#WfF
private static String[] name={ }2S!;swg+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6!0NFP~b
}; _YR#J%xa
cd,'37pZ
private static Sort[] impl=new Sort[]{ cHr]{@7Cs
new InsertSort(), YIW9z{rrs
new BubbleSort(), bE% Hm!
new SelectionSort(), 'X+aYF}Ye
new ShellSort(), H#GR*4x
new QuickSort(), 5K9W5hA:D
new ImprovedQuickSort(), (9( xJ)
new MergeSort(), %P1zb7:8
new ImprovedMergeSort(), f5bX,e)!
new HeapSort() Y<POdbg
}; z5({A2q
hoBFC1
public static String toString(int algorithm){ l+6@,TY1U
return name[algorithm-1]; 4d@0v n{
} M6MxY\uM
mQ}\ptdfV
public static void sort(int[] data, int algorithm) { Eyf17
impl[algorithm-1].sort(data); 74 ptd,
} rkS'OC
+Q_xY>ej
public static interface Sort { +e>G V61
public void sort(int[] data); >h2qam
} "K>!+<
9{nU\am!\
public static void swap(int[] data, int i, int j) { X)]>E]X
int temp = data; !V#*(_+n
data = data[j]; ?xKiN5q"6
data[j] = temp; O<!^^7/h0
} R-n%3oh
} 6C.!+km